I saw a guide on here that states if your Castlevania 64 copy has a number engraved on the back (and not a letter engraving) then it's the 1.0 version of the game. My copy was an "08" engraved on the back and I just wanted to confirm that it's a 1.0 copy.

If you want to check me out on twitch that's where i'll be streaming my progress on my channel