Stan/David---the tanks are I believe are in fact Russian T80s with modifications ie the second photo but with no protective skirt over the roller wheels which might be a shipping thing but it appears they are loading at a railhead and the first photo appears to be the T90 as the side skirt is straight and level through the entire side of the tank whereas the T80 has a wave shape (along the first three rollers) at the front portion of the side skirt. Both carry the same config in reactive amour.
The Ukrainians have the T80s as well but have not shown them in photos up on the border as they have them hidden for protection or bunkered in fixed locations only displaying the turret.
There was a exact replica of the tank on the railcar recently in the Kiev Post depicting Russian armor on the Crimean border.
The Russians had a Naval Marine unit on the Crimea with heavy tanks---the Russians have signaled they will return equipment but I agree with you that heavy weapons are probably not on that list and they have not stated when they will return the equipment.
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