...and don't forget Romania. These are most commonly mistaken for being Soviet, as the Cugir symbol - an arrow in a triangle - is very similar to the Soviet Izhevsk mark.
The years of production for Eastern European Mosins:
Hungary: M91/30s from 1950-54. M44s from 1952-53.
Poland: M91/30s in 1951 only. M44s from 1951-55.
Romania: M91/30s in 1955 only. M44s from 1953-55.