Unified Vietnam, Day of Cosmonautics, December 30th, 1988, Michel Nr. 1950-1957, Block 63; Seven stamps in nominals of 10D (two stamps), 20D (two stamps), 30D (two stamps) and…
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Unified Vietnam, Day of Cosmonautics, December 30th, 1988, Michel Nr. 1950-1957, Block 63; Seven stamps in nominals of 10D (two stamps), 20D (two stamps), 30D (two stamps) and…