I found a Facebook thread for what looked like an identical piece, and the context given was:

"Fox", 1961.

Leningrad Porcelain Factory (Ленинградский завод фарфоровых изделий - ЛЗФИ).

Author: Lev Naumovich Smorgon (February 17, 1929, Detskoe Selo, Leningrad Region) - sculptor, painter, graphic artist, medalist, children's toy artist, writer.