Budapest 1956 Soviet armor??

Thinking the T-34/85 would be the best pick.

There are many suitable kits of this best. Best thing is the age of the tank can allow for quite faded and weathered paint.

Any that remained is service after WWII most likely were repainted. So 10 years of fade and general wear and tear without battle damage or repaired damage.

A few 'patches' over shot deflections on the front plate would be a nice touch, possibly some bullet gouges on the turret. Remember all this would have been painted over.

From what I can see in pics, not many T54s or T55s were used then.  There were lots of JS3s, T34s, and PT76s though.  The markings look like standard Soviet turret numbers and that's about it.

You can see lots more pics here.