| William J Kozersky, Philatelist > Site Map > U.S. CHRISTMAS SEALS > Essays & Proofs > Progressive Proofs (PCPs) |
| Progressive Proofs (PCPs) |
| U.S. Christmas Seals, PCP Progressive Color Proofs Collection, 1930-53 |
| 1927-3pcp, WX41, 1927 U.S. National Christmas Seals, PCPs, four (4) stages |
| 1927-3pcp, WX41, 1927 U.S. National Christmas Seals, PCPs, four (4) stages |
| 1928-1pcp2, WX44, 1928 U.S. National Christmas Seals, PCPs, seven (7) stages |
| 1929-2pcp1, WX50, 1929 U.S. National Christmas Seals, PCPs, three (3) stages |
| 1930-4pcp, WX55, 1930 U.S. National Christmas Seals, PCPs, four (4) stages |
| 1931-1Bpcp, WX61, 1931 U.S. National Christmas Seals, PCPs, seven (7) stages |
| 1932-1Bpcp, WX92, 1932 U.S. National Christmas Seals, PCPs, 7 stages |
| 1933-1pcp, WX68, 1933 U.S. National Christmas Seals, PCPs, 7 stages |
| 1934-1pcp, WX72, 1934 U.S. National Christmas Seals, PCPs, 7 stages |
| 1935-1pcp, WX76, 1935 U.S. National Christmas Seals, PCPs, 7 stages |
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