No big chances for luck, but maybe. This oscilloscope has been produced during 1980s and 1990s in the USSR and later on Lithuania by a company called Rimeda (during USSR period companies didn't have names). English version of this manual does exist for sure, but I had no luck to get one. I have scans of a few first pages.
P.S.
Proper name in Latin alphabet would be S1-112A. If anyone needs it I've got Russian and German manuals for this unit.