Proof Block Larger Than four 4c Brown & Black, plate proof on card (R136P4), bottom imprint and double plate no. block of ten, also incl. top 'patent' imprint block of ten, large margins, fresh, very fine , Scott retail as single proofs $300.00 est.
Proof Block Larger Than four 4c Brown & Black, plate proof on card (R136P4), bottom imprint and double plate no. block of ten, also incl. top 'patent' imprint block of ten, large margins, fresh, very fine , Scott retail as single proofs $300.00 est.
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