It says: ЛЕНОБЛМЕТАЛЛОПРОМСОЮЗ “МЕТАЛЛИСТ” ГАТЧИНА which means “‘The Leningrad Oblast Metal Industry Union, ‘Metallist’, Gatchina”. “‘The Leningrad Oblast Metal Industry Union” was the name of the metal workshops / cooperatives organization of Leningrad Oblast with “Matallist” being one of such workshops called “artel” in those times. Gatchina is a town in the Leningrad Oblast, Russia, near St. Petersburg, it used to be the residence of the Russian Royal Family and it's famous for the royal palace situated there.
Woow I searched the internet and couldn't find anything about this lock other than it was made by Metallist. Thank you very much for sharing such an interesting information about it.
Splendid restoration job you did restoring that old padlock and making a new key for it. It looks much better and it works like a charm too. Excellent work as usual.
This plant still exists. Its current name is "Burevestnik". This plant produced padlocks from 1944 to 1960. And in the “small” city of Gatchina there live almost 100 thousand inhabitants.)