Interesting also in that top picture the number of turret variations.
Early '76s had a one piece hatch - pretty much half of the turret roof - but it was so heavy and obstructive to the commanders view forward that after much whining from the tankists it was revised to two separate light hatches. The commander eventually got a cupola so he could actually see what was going on when he wasn't aiming the gun. Also, there were several factories churning the things out and each one put their own variations into the base design. For example, Tank Plant 183 in Nizhny Tagil fitted spoked road wheels to their '76s whereas "Tankograd" (Chelyabinsk) fitted solid ones (although during the hiatus of moving the factories east examples could be seen with mixed wheel styles as any old wheel available was chucked on - including those salvaged from wrecks). The '85 was more standardised across the plants but individualities would still crop up, and it corrected the mistake of the two-man turret so the commander could concentrate on fighting the tank and leave the gunnery to someone else.
Over the duration of the war there were 60,000 T-34s produced, of which 50,000 were lost. The last known combat action by a T-34 was a couple of years ago in Yemen.
