When did the last 1895 leave the factory
I don't know, but have more questions.
Last to leave the factory according to ledger or legend?
Sounds like Marlin had completed ~5000 rifles by 1898.
Savage had setup in 2 smaller temporary factories in Utica until the main factory was built.
Did Savage continue to "put together" 1895's post Marlin?
Savage may well have had inventory and/or carry over rifles for one reason or another.
Savage may still have one in house!