DBM I wandered around the interwebs until I found an international Morse code translator.
It appears to be:
F E(with an accent over it) you T O 4 O T R M
The Cyrillic alphabet changed in 1918 so assuming the coin is older than that, I found the old alphabet -- and that's that. It doesn't match up at all.
I thought it might be an engineering equation but I can't find anything.
I think the next step would be to find a really old Russian communications engineer.