MALI (1972) Swimmers-200 meter breaststroke*. University library*. Aztec sculpture*. Die proof in violet signed by the engraver MONVOISIN. Mexico Olympics retrospective. Scott No C163, Yvert No PA163.
AVAILABLE AT $160
CZECHOSLOVAKIA (1980) Female swimmers*. Die proof in color. Moscow Olympics. Scott No 2294, Yvert No 2372. Czech proofs are very rare - only 2-5 were ever made!
AVAILABLE AT $225