I think that there’s something wrong with this info and dates, since I read a paperback version , in English, in 1965 or ‘66. I do remember liking the book, though .
Perhaps it was 1967?
(1967). The Master & Margarita. Ginsburg, Mirra transl. New York: Grove.
[1967, Harper & Row and Harvill]. The Master & Margarita. Glenny, Michael transl; Franklin, Simon intr. New York; London: Knopf; Everyman’s Library.