The BDŽ 71 002-0 seen at Septemvri

The best known product of the Kambarka Engineering Works of the Soviet Union is an interesting piece of equipment at the Septemvri to Dobrinishte Rodope Narrow-gauge Railway as it shunts with the passenger cars. Similar locomotives operate at many other Eastern railway, I have photos from Berehovo where, I believe, they never entered service after delivery: