| William J Kozersky, Philatelist > Site Map > U.S. CHRISTMAS SEALS > Essays & Proofs |
| Essays & Proofs |
| Printer's Proofs |
| Progressive Proofs (PCPs) |
| Essays |
| Die Proofs |
| Imperforate Proofs |
| 1937-1pcp, WX88, 1937 U.S. National Christmas Seals, PCPs, 7 stages |
| 1938-1pcp, WX92, 1938 U.S. National Christmas Seals, PCPs, 7 stages |
| 1939-1.2pcp, WX96, 1939 U.S. Christmas Seals, PCPs, NG |
| 1940-1pcpA, WX100, 1940 U.S. Christmas Seals, PCPs, MNH |
| 1941-1pcp, WX104, 1941 U.S. Christmas Seals, PCPs, MNH |
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