I believe at least one was used in the SCW?
If so, Ian 's got a sale here!
Sadly, thatīs an unsubstantiated myth, according to Steven J. Zaloga... apparently, T-26s and BT-5s are well-documented, but the T-28 appears to have been a misidentification, perpetuated by subsequent publications.
Of course, you should STILL buy one, just for the lovely model. Iīm seriously tempted, and I donīt even plan on doing Winter War soviets...