All right, no one had any input here, but I came up with a link for the trailer of the this movie over on the old IMDb site. The link is:
http://video.google.com/videoplay?docid=940682253793718263
Perhaps this will stir some interest in the film. But I have an answer to my own question in viewing this trailer. The tanks are post-war T34/85s, with muzzle brakes on their 85mm cannons. They are not even mocked up to resemble Tigers or Panthers as has been done in films such as THE NIGHT OF THE GENERALS and KELLY'S HEROES. But the film is a mythic parable anyway, so it works for the time being. If there is an enterprising soul who knows how to frame capture from a link like this, perhaps we can see the pictures posted in the regular section of IMCDb.