diff --git a/zebra-chain/src/primitives/zcash_primitives.rs b/zebra-chain/src/primitives/zcash_primitives.rs
index 564afab0..608ff0d1 100644
--- a/zebra-chain/src/primitives/zcash_primitives.rs
+++ b/zebra-chain/src/primitives/zcash_primitives.rs
@@ -161,8 +161,7 @@ impl TryFrom<&Transaction> for zp_tx::Transaction {
             Transaction::V5 {
                 network_upgrade, ..
             } => network_upgrade,
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 { .. } => panic!("Zebra only uses librustzcash for V5 transactions"),
         };
diff --git a/zebra-chain/src/transaction.rs b/zebra-chain/src/transaction.rs
index 3f099c2d..9582743f 100644
--- a/zebra-chain/src/transaction.rs
+++ b/zebra-chain/src/transaction.rs
@@ -68,16 +68,6 @@ use crate::{
     derive(Serialize)
 )]
 pub enum Transaction {
-    /// A fully transparent transaction (`version = 1`).
-    V1 {
-        /// The transparent inputs to the transaction.
-        inputs: Vec<transparent::Input>,
-        /// The transparent outputs from the transaction.
-        outputs: Vec<transparent::Output>,
-        /// The earliest time or block height that this transaction can be added to the
-        /// chain.
-        lock_time: LockTime,
-    },
     /// A Sprout transaction (`version = 2`).
     V2 {
         /// The transparent inputs to the transaction.
@@ -232,8 +222,7 @@ impl Transaction {
     /// [ZIP-244]: https://zips.z.cash/zip-0244.
     pub fn auth_digest(&self) -> Option<AuthDigest> {
         match self {
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 { .. } => None,
             Transaction::V5 { .. } => Some(AuthDigest::from(self)),
@@ -308,7 +297,7 @@ impl Transaction {
     /// Return if the `fOverwintered` flag of this transaction is set.
     pub fn is_overwintered(&self) -> bool {
         match self {
-            Transaction::V1 { .. } | Transaction::V2 { .. } => false,
+            Transaction::V2 { .. } => false,
             Transaction::V3 { .. } | Transaction::V4 { .. } | Transaction::V5 { .. } => true,
         }
     }
@@ -316,7 +305,6 @@ impl Transaction {
     /// Return the version of this transaction.
     pub fn version(&self) -> u32 {
         match self {
-            Transaction::V1 { .. } => 1,
             Transaction::V2 { .. } => 2,
             Transaction::V3 { .. } => 3,
             Transaction::V4 { .. } => 4,
@@ -327,8 +315,7 @@ impl Transaction {
     /// Get this transaction's lock time.
     pub fn lock_time(&self) -> Option<LockTime> {
         let lock_time = match self {
-            Transaction::V1 { lock_time, .. }
-            | Transaction::V2 { lock_time, .. }
+            Transaction::V2 { lock_time, .. }
             | Transaction::V3 { lock_time, .. }
             | Transaction::V4 { lock_time, .. }
             | Transaction::V5 { lock_time, .. } => *lock_time,
@@ -385,7 +372,7 @@ impl Transaction {
     /// Get this transaction's expiry height, if any.
     pub fn expiry_height(&self) -> Option<block::Height> {
         match self {
-            Transaction::V1 { .. } | Transaction::V2 { .. } => None,
+            Transaction::V2 { .. } => None,
             Transaction::V3 { expiry_height, .. }
             | Transaction::V4 { expiry_height, .. }
             | Transaction::V5 { expiry_height, .. } => match expiry_height {
@@ -406,8 +393,8 @@ impl Transaction {
     #[cfg(any(test, feature = "proptest-impl"))]
     pub fn expiry_height_mut(&mut self) -> &mut block::Height {
         match self {
-            Transaction::V1 { .. } | Transaction::V2 { .. } => {
-                panic!("v1 and v2 transactions are not supported")
+            Transaction::V2 { .. } => {
+                panic!("v2 transactions are not supported")
             }
             Transaction::V3 {
                 ref mut expiry_height,
@@ -430,8 +417,7 @@ impl Transaction {
     /// [7.1]: https://zips.z.cash/protocol/nu5.pdf#txnencodingandconsensus
     pub fn network_upgrade(&self) -> Option<NetworkUpgrade> {
         match self {
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 { .. } => None,
             Transaction::V5 {
@@ -445,7 +431,6 @@ impl Transaction {
     /// Access the transparent inputs of this transaction, regardless of version.
     pub fn inputs(&self) -> &[transparent::Input] {
         match self {
-            Transaction::V1 { ref inputs, .. } => inputs,
             Transaction::V2 { ref inputs, .. } => inputs,
             Transaction::V3 { ref inputs, .. } => inputs,
             Transaction::V4 { ref inputs, .. } => inputs,
@@ -457,7 +442,6 @@ impl Transaction {
     #[cfg(any(test, feature = "proptest-impl"))]
     pub fn inputs_mut(&mut self) -> &mut Vec<transparent::Input> {
         match self {
-            Transaction::V1 { ref mut inputs, .. } => inputs,
             Transaction::V2 { ref mut inputs, .. } => inputs,
             Transaction::V3 { ref mut inputs, .. } => inputs,
             Transaction::V4 { ref mut inputs, .. } => inputs,
@@ -475,7 +459,6 @@ impl Transaction {
     /// Access the transparent outputs of this transaction, regardless of version.
     pub fn outputs(&self) -> &[transparent::Output] {
         match self {
-            Transaction::V1 { ref outputs, .. } => outputs,
             Transaction::V2 { ref outputs, .. } => outputs,
             Transaction::V3 { ref outputs, .. } => outputs,
             Transaction::V4 { ref outputs, .. } => outputs,
@@ -487,9 +470,6 @@ impl Transaction {
     #[cfg(any(test, feature = "proptest-impl"))]
     pub fn outputs_mut(&mut self) -> &mut Vec<transparent::Output> {
         match self {
-            Transaction::V1 {
-                ref mut outputs, ..
-            } => outputs,
             Transaction::V2 {
                 ref mut outputs, ..
             } => outputs,
@@ -542,8 +522,7 @@ impl Transaction {
             } => Box::new(joinsplit_data.joinsplits()),
 
             // No JoinSplits / JoinSplits with BCTV14 proofs
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 {
                 joinsplit_data: None,
@@ -571,8 +550,7 @@ impl Transaction {
                 ..
             } => joinsplit_data.joinsplits().count(),
             // No JoinSplits
-            Transaction::V1 { .. }
-            | Transaction::V2 {
+            Transaction::V2 {
                 joinsplit_data: None,
                 ..
             }
@@ -610,8 +588,7 @@ impl Transaction {
                 ..
             } => Box::new(joinsplit_data.nullifiers()),
             // No JoinSplits
-            Transaction::V1 { .. }
-            | Transaction::V2 {
+            Transaction::V2 {
                 joinsplit_data: None,
                 ..
             }
@@ -646,8 +623,7 @@ impl Transaction {
                 ..
             } => Some(joinsplit_data.pub_key),
             // No JoinSplits
-            Transaction::V1 { .. }
-            | Transaction::V2 {
+            Transaction::V2 {
                 joinsplit_data: None,
                 ..
             }
@@ -667,7 +643,7 @@ impl Transaction {
     pub fn has_sprout_joinsplit_data(&self) -> bool {
         match self {
             // No JoinSplits
-            Transaction::V1 { .. } | Transaction::V5 { .. } => false,
+            Transaction::V5 { .. } => false,
 
             // JoinSplits-on-BCTV14
             Transaction::V2 { joinsplit_data, .. } | Transaction::V3 { joinsplit_data, .. } => {
@@ -713,7 +689,6 @@ impl Transaction {
                 joinsplit_data: None,
                 ..
             }
-            | Transaction::V1 { .. }
             | Transaction::V5 { .. } => Box::new(std::iter::empty()),
         }
     }
@@ -737,8 +712,7 @@ impl Transaction {
             } => Box::new(sapling_shielded_data.anchors()),
 
             // No Spends
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 {
                 sapling_shielded_data: None,
@@ -775,8 +749,7 @@ impl Transaction {
             } => Box::new(sapling_shielded_data.spends_per_anchor()),
 
             // No Spends
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 {
                 sapling_shielded_data: None,
@@ -803,8 +776,7 @@ impl Transaction {
             } => Box::new(sapling_shielded_data.outputs()),
 
             // No Outputs
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 {
                 sapling_shielded_data: None,
@@ -833,8 +805,7 @@ impl Transaction {
             } => Box::new(sapling_shielded_data.nullifiers()),
 
             // No Spends
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 {
                 sapling_shielded_data: None,
@@ -863,8 +834,7 @@ impl Transaction {
             } => Box::new(sapling_shielded_data.note_commitments()),
 
             // No Spends
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 {
                 sapling_shielded_data: None,
@@ -880,7 +850,7 @@ impl Transaction {
     /// Return if the transaction has any Sapling shielded data.
     pub fn has_sapling_shielded_data(&self) -> bool {
         match self {
-            Transaction::V1 { .. } | Transaction::V2 { .. } | Transaction::V3 { .. } => false,
+            Transaction::V2 { .. } | Transaction::V3 { .. } => false,
             Transaction::V4 {
                 sapling_shielded_data,
                 ..
@@ -905,8 +875,7 @@ impl Transaction {
             } => orchard_shielded_data.as_ref(),
 
             // No Orchard shielded data
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 { .. } => None,
         }
@@ -922,8 +891,7 @@ impl Transaction {
                 ..
             } => Some(orchard_shielded_data),
 
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 { .. }
             | Transaction::V5 {
@@ -1042,8 +1010,7 @@ impl Transaction {
                     .map(|joinsplit| &joinsplit.vpub_old),
             ),
             // No JoinSplits
-            Transaction::V1 { .. }
-            | Transaction::V2 {
+            Transaction::V2 {
                 joinsplit_data: None,
                 ..
             }
@@ -1091,8 +1058,7 @@ impl Transaction {
                     .map(|joinsplit| &mut joinsplit.vpub_old),
             ),
             // No JoinSplits
-            Transaction::V1 { .. }
-            | Transaction::V2 {
+            Transaction::V2 {
                 joinsplit_data: None,
                 ..
             }
@@ -1138,8 +1104,7 @@ impl Transaction {
                     .map(|joinsplit| &joinsplit.vpub_new),
             ),
             // No JoinSplits
-            Transaction::V1 { .. }
-            | Transaction::V2 {
+            Transaction::V2 {
                 joinsplit_data: None,
                 ..
             }
@@ -1187,8 +1152,7 @@ impl Transaction {
                     .map(|joinsplit| &mut joinsplit.vpub_new),
             ),
             // No JoinSplits
-            Transaction::V1 { .. }
-            | Transaction::V2 {
+            Transaction::V2 {
                 joinsplit_data: None,
                 ..
             }
@@ -1228,8 +1192,7 @@ impl Transaction {
                 joinsplit_data: Some(joinsplit_data),
                 ..
             } => joinsplit_data.joinsplit_value_balances(),
-            Transaction::V1 { .. }
-            | Transaction::V2 {
+            Transaction::V2 {
                 joinsplit_data: None,
                 ..
             }
@@ -1284,8 +1247,7 @@ impl Transaction {
                 ..
             } => sapling_shielded_data.value_balance,
 
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 {
                 sapling_shielded_data: None,
@@ -1315,8 +1277,7 @@ impl Transaction {
                 sapling_shielded_data: Some(sapling_shielded_data),
                 ..
             } => Some(&mut sapling_shielded_data.value_balance),
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 {
                 sapling_shielded_data: None,
diff --git a/zebra-chain/src/transaction/arbitrary.rs b/zebra-chain/src/transaction/arbitrary.rs
index 432b83b2..afed9a60 100644
--- a/zebra-chain/src/transaction/arbitrary.rs
+++ b/zebra-chain/src/transaction/arbitrary.rs
@@ -35,21 +35,6 @@ pub const MAX_ARBITRARY_ITEMS: usize = 4;
 // TODO: if needed, fixup transaction outputs
 //       (currently 0..=9 outputs, consensus rules require 1..)
 impl Transaction {
-    /// Generate a proptest strategy for V1 Transactions
-    pub fn v1_strategy(ledger_state: LedgerState) -> BoxedStrategy<Self> {
-        (
-            transparent::Input::vec_strategy(&ledger_state, MAX_ARBITRARY_ITEMS),
-            vec(any::<transparent::Output>(), 0..MAX_ARBITRARY_ITEMS),
-            any::<LockTime>(),
-        )
-            .prop_map(|(inputs, outputs, lock_time)| Transaction::V1 {
-                inputs,
-                outputs,
-                lock_time,
-            })
-            .boxed()
-    }
-
     /// Generate a proptest strategy for V2 Transactions
     pub fn v2_strategy(ledger_state: LedgerState) -> BoxedStrategy<Self> {
         (
@@ -760,7 +745,6 @@ impl Arbitrary for Transaction {
 
     fn arbitrary_with(ledger_state: Self::Parameters) -> Self::Strategy {
         match ledger_state.transaction_version_override() {
-            Some(1) => return Self::v1_strategy(ledger_state),
             Some(2) => return Self::v2_strategy(ledger_state),
             Some(3) => return Self::v3_strategy(ledger_state),
             Some(4) => return Self::v4_strategy(ledger_state),
@@ -770,9 +754,8 @@ impl Arbitrary for Transaction {
         }
 
         match ledger_state.network_upgrade() {
-            NetworkUpgrade::Genesis | NetworkUpgrade::BeforeOverwinter => {
-                Self::v1_strategy(ledger_state)
-            }
+            //TODO - LOOK AT network_upgrade see where NetworkUpgrade::Genesis and
+            //  NetworkUpgrade::BeforeOverwinterare used
             NetworkUpgrade::Overwinter => Self::v2_strategy(ledger_state),
             NetworkUpgrade::Sapling => Self::v3_strategy(ledger_state),
             NetworkUpgrade::Blossom | NetworkUpgrade::Heartwood | NetworkUpgrade::Canopy => {
@@ -783,6 +766,7 @@ impl Arbitrary for Transaction {
                 Self::v5_strategy(ledger_state)
             ]
             .boxed(),
+            _ => {}
         }
     }
 
@@ -859,19 +843,6 @@ pub fn transaction_to_fake_v5(
     let block_nu = NetworkUpgrade::current(network, height);
 
     match trans {
-        V1 {
-            inputs,
-            outputs,
-            lock_time,
-        } => V5 {
-            network_upgrade: block_nu,
-            inputs: inputs.to_vec(),
-            outputs: outputs.to_vec(),
-            lock_time: *lock_time,
-            expiry_height: height,
-            sapling_shielded_data: None,
-            orchard_shielded_data: None,
-        },
         V2 {
             inputs,
             outputs,
diff --git a/zebra-chain/src/transaction/serialize.rs b/zebra-chain/src/transaction/serialize.rs
index 044db7d5..63239616 100644
--- a/zebra-chain/src/transaction/serialize.rs
+++ b/zebra-chain/src/transaction/serialize.rs
@@ -481,20 +481,6 @@ impl ZcashSerialize for Transaction {
         writer.write_u32::<LittleEndian>(version)?;
 
         match self {
-            Transaction::V1 {
-                inputs,
-                outputs,
-                lock_time,
-            } => {
-                // Denoted as `tx_in_count` and `tx_in` in the spec.
-                inputs.zcash_serialize(&mut writer)?;
-
-                // Denoted as `tx_out_count` and `tx_out` in the spec.
-                outputs.zcash_serialize(&mut writer)?;
-
-                // Denoted as `lock_time` in the spec.
-                lock_time.zcash_serialize(&mut writer)?;
-            }
             Transaction::V2 {
                 inputs,
                 outputs,
@@ -732,14 +718,6 @@ impl ZcashDeserialize for Transaction {
         //
         // https://zips.z.cash/protocol/protocol.pdf#txnconsensus
         match (version, overwintered) {
-            (1, false) => Ok(Transaction::V1 {
-                // Denoted as `tx_in_count` and `tx_in` in the spec.
-                inputs: Vec::zcash_deserialize(&mut limited_reader)?,
-                // Denoted as `tx_out_count` and `tx_out` in the spec.
-                outputs: Vec::zcash_deserialize(&mut limited_reader)?,
-                // Denoted as `lock_time` in the spec.
-                lock_time: LockTime::zcash_deserialize(&mut limited_reader)?,
-            }),
             (2, false) => {
                 // Version 2 transactions use Sprout-on-BCTV14.
                 type OptV2Jsd = Option<JoinSplitData<Bctv14Proof>>;
diff --git a/zebra-chain/src/transaction/txid.rs b/zebra-chain/src/transaction/txid.rs
index f67f6dee..8c532d06 100644
--- a/zebra-chain/src/transaction/txid.rs
+++ b/zebra-chain/src/transaction/txid.rs
@@ -24,8 +24,7 @@ impl<'a> TxIdBuilder<'a> {
     /// Compute the Transaction ID for the previously specified transaction.
     pub(super) fn txid(self) -> Result<Hash, io::Error> {
         match self.trans {
-            Transaction::V1 { .. }
-            | Transaction::V2 { .. }
+            Transaction::V2 { .. }
             | Transaction::V3 { .. }
             | Transaction::V4 { .. } => self.txid_v1_to_v4(),
             Transaction::V5 { .. } => self.txid_v5(),
diff --git a/zebra-chain/src/transaction/unmined.rs b/zebra-chain/src/transaction/unmined.rs
index da716573..7b43f8bc 100644
--- a/zebra-chain/src/transaction/unmined.rs
+++ b/zebra-chain/src/transaction/unmined.rs
@@ -139,7 +139,7 @@ impl From<Transaction> for UnminedTxId {
 impl From<&Transaction> for UnminedTxId {
     fn from(transaction: &Transaction) -> Self {
         match transaction {
-            V1 { .. } | V2 { .. } | V3 { .. } | V4 { .. } => Legacy(transaction.into()),
+            V2 { .. } | V3 { .. } | V4 { .. } => Legacy(transaction.into()),
             V5 { .. } => Witnessed(transaction.into()),
         }
     }
diff --git a/zebra-consensus/src/transaction.rs b/zebra-consensus/src/transaction.rs
index 4dc1f1e1..c92cd658 100644
--- a/zebra-consensus/src/transaction.rs
+++ b/zebra-consensus/src/transaction.rs
@@ -385,7 +385,7 @@ where
             tracing::trace!(?tx_id, "got state UTXOs");
 
             let mut async_checks = match tx.as_ref() {
-                Transaction::V1 { .. } | Transaction::V2 { .. } | Transaction::V3 { .. } => {
+                Transaction::V2 { .. } | Transaction::V3 { .. } => {
                     tracing::debug!(?tx, "got transaction with wrong version");
                     return Err(TransactionError::WrongVersion);
                 }
diff --git a/zebra-state/src/service/non_finalized_state/chain.rs b/zebra-state/src/service/non_finalized_state/chain.rs
index 45bbb026..38501a71 100644
--- a/zebra-state/src/service/non_finalized_state/chain.rs
+++ b/zebra-state/src/service/non_finalized_state/chain.rs
@@ -1510,7 +1510,7 @@ impl Chain {
                     sapling_shielded_data,
                     orchard_shielded_data,
                 ),
-                V1 { .. } | V2 { .. } | V3 { .. } => unreachable!(
+                V2 { .. } | V3 { .. } => unreachable!(
                     "older transaction versions only exist in finalized blocks, because of the mandatory canopy checkpoint",
                 ),
             };
@@ -1671,7 +1671,7 @@ impl UpdateWith<ContextuallyVerifiedBlock> for Chain {
                     sapling_shielded_data,
                     orchard_shielded_data,
                 ),
-                V1 { .. } | V2 { .. } | V3 { .. } => unreachable!(
+                V2 { .. } | V3 { .. } => unreachable!(
                     "older transaction versions only exist in finalized blocks, because of the mandatory canopy checkpoint",
                 ),
             };