1972

SG509 with "retouch to blue in upper left corner" (BW590d)

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SG509 with "white dot above head" (BW590e)

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SG509 with "retouch to blue at upper left" (BW590f)

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SG516 with "line on ball" (BW598f)

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SG522 with "retouch over u of Australia" (BW605d)

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SG522 with "retouch around gr of Congress" (BW605f)

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SG527 with "black dot on window blind" (BW614, Mc6)

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SG529 with "retouch left of 80c" (BW618j)

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