T-54/55 versions

[brummbaer]

Marcello: I don't know about the bow MG exchanged for more rounds.
I hope this can be useful to the staff for updating the oobs. It's up to them decide which versions to include in the game and which not.

I have a similar list for T-72, while I still have to find the time to study the T-64 and T-80. Let me know if you find it useful. If not I don't want to clutter the forum with further threads.