M-55 / M-17RM, V.M.Myasichev 'Mystic'

In-flight photo (16k) by Ken Duffey taken at Khodynka Museum, found at Khodynka Images Page maintained by A.Gretchihine;

M-55 is a factory designation for the twin-engined version of the M-17, known as M-17RM to the military.