62 class Us were built between 1906 and 1916 at the Putilov factory (later the Kirov Plant.

By the beginning of 1940 the inventory still listed 47 class U locomotives.

For this reason it has escaped the ravages of time and, much like Lenin himself, it was preserved in perfect condition.

[2] U-127 was the Soviet Union's first and, until the 1980s, only preserved Russian locomotive.

[2] U-127 was built in 1910 with builder's number 1960, and was destined for the Tashkent railway.