Proof Block Larger Than four 1987, America's Cup, plate proofs (I) with 160 (40 of each value), (P) with 400, (MS) with 60 including 45 progressives

细节
Proof Block Larger Than four 1987, America's Cup, plate proofs (I) with 160 (40 of each value), (P) with 400, (MS) with 60 including 45 progressives