Hej Bent,

Det drejer sig formentlig om Людиновский тепловозостроительный завод - Lyudinovsky Locomotive Plant, der ligger i Людиновский райо́н - Lyudinovsky District i Kaluga Oblast, Russia.

Se desuden: https://en.wikipedia.org/wiki/Rolling_stock_manufacturers_of_Russia og https://en.wikipedia.org/wiki/Category:Locomotive_manufacturers_of_Ukraine .

M.v.h.
Niels