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Thanks Qrt.S

So the cyrillic "inverted v" or "lambda" should be the town mark of Leningrad (Saint Petersburg).
But I didn't find anything on the ring and diamond symbol.
Any clue regarding the hallmarks or the manufacturing year is kindly appreciated.
Regards

Hi, I bought a set of USSR teaspoons.



Any help with narrowing down where this was made or who made it is greatly appreciated!
Regards