Lot 1671
1671
Proof 6c. die proofs (2) in black on glazed card (92x60mm.), marked "BEFORE re HARDENING" and "AFTER re HARDENING" and each dated "5 MAR 80"; Rare. Photo

Details
Proof 6c. die proofs (2) in black on glazed card (92x60mm.), marked "BEFORE re HARDENING" and "AFTER re HARDENING" and each dated "5 MAR 80"; Rare. Photo

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