The Soviet oval hallmark with the androgyny's head tells us that your object is made in Moscow 1927-1954. Unfortunately the maker's mark is unknown to me. Never seen it before. Let's wait and see if somebody can come up with an answer. BTW; what is it?
Full maker name is "Московский Платиновый Завод" (Moscow Platinum Plant). Also you can meet punch - "МПЗ". Factory occuped former factory of Khlebnikov in 1918. Mainly produced technical products from platinum. Factory also produced household products from silver and melchior. Used the old equipment of Khlebnikov's factory. Later it renamed "Завод "ПЛАТИНОПРИБОР" (Plant"Platinum Device").