Unified Vietnam, International Stamp Exhibition Argentina 85, July 5th, 1985, Michel Nr. 1580-1587, Block 38; Seven stamps in nominals of 1D (two stamps), 2D (two stamps), 3D, 4D…
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Unified Vietnam, International Stamp Exhibition Argentina 85, July 5th, 1985, Michel Nr. 1580-1587, Block 38; Seven stamps in nominals of 1D (two stamps), 2D (two stamps), 3D, 4D…