Combination (C)

Soviet Union 1965 / Set of 2 stamps (issued October 6th) / mint condition /

Michel #3123-24 / Yvert #3022-23

+

Soviet Union 1965 / Set of 2 stamps (issued November 20th) / mint condition /

Michel #3134-35

+

Soviet Union 1965 / Set of 3 stamps (issued December 24th) / mint condition /

Michel #3162-64

+

Soviet Union 1966 / Overprinted single stamp - Philatelic conference (issued March 10th 1966) / mint condition /

Michel #3192 / Yvert #3074

Note: The black hawid is not included.