During a battle of Odessa in 1941, participated in combat a battalion of tanks Bt-5 and Bt-7. 35 tanks were up-armored in "January Uprising Factory". Modifications were made under the direction lieutenant Pieniesho. Up-armored was made from 30mm ship steel. The photos i found on ebay. I think that this is just one of tanks repaired in Odessa. In my opinion that is a pefrect subject to conversion.