I've never seen anything this good on the web before. Some guys in Russia run this project. The uniforms are authentic to the last button. Note the tankist with flags. As late as mid-war most Soviet tanks had no radio. A really sophisticated tank unit in late war would have mostly receivers and only commanders had transmitters. Flag signaling from the turret hatch was used between tanks, very much like in naval warfare between ships.
http://www.rkka.ru/iuniform.htm
