Notes: Under the renumbering of 1912 this class was devised to cover the wide range of existing freight tank locomotives of various ancestries, sizes and wheel-arrangements, primarily 0-4-OT, 0-6-OT and 0-8-OT. (Passenger tank engines were correspondinglygrouped as the " (hard sign) class.) There were 34 still in stock in 1967, of which 26 were in regular use, but the majority of these had been withdrawn by 1975. Most of the dozen examples still extant in 1992 (2 in stock, 10 others preserved) were built at the Kolomna and Nevskii factories at the turn of the century; however, no.2137 is thought to be one of a batch of six locomotives supplied by Beyer, Peacock in 1932. As for the status of the two locomotives still in stock at the end of 1991, no.2021 was in effect preserved at Krasnodar, while 2137 was operated at Korosten' by the Yugo-Zapadnaya Railway as an attraction for visiting tourist groups. (Technical details above are for the Beyer, Peacock locomotives of 1932.)
