I have the accurate armour vt-34 and was looking at various images on the web. The are some images which show a possible training or privately used vehicle with a strange track and sprocket combo.
http://www.brdm2.estranky.cz/fotoalbum/tanky/vyprostovaci-tank-vt-34/17.--vt-34.html

I have not posted any pics as do not want any copyright problems so hope this link works OK.

Just want to know if there are any 1/35 items available? They do not seem to be t-55,62,72,80,90 as the sprocket teeth do not run on the outside of the track. Help!

I think I might have an answer to my own question. Looks like from a t-55 as just looked at an enigma image. Doh!