Proofs ex the Archives. 1988. SACC 369. Marginal Gutter Control Block. Only 9 such blocks can exist.
South West Africa. Proofs ex the Archives. 1988 20c Reprint (SACC 369) in a Marginal Gutter Control Block. Very fine unmounted mint.
R1550
REF NW052
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Proofs ex the Archives. 1988. SACC 369. Marginal Gutter Control Block. Only 9 such blocks can exist.
