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1485, MNH 8¢ Misperforated Freaky Error Sheet of 40 Stamps * Stuart Katz
$559.30
1288b, Mint NH SPECTACULAR MISPERFORATED PANE ERROR
$164.50
1507, MNH 8¢ Two Way Misperforated Freaky Error Sheet of 50 Stamps * Stuart Katz
$705.00
1471, MNH 8¢ Perf Shift Freaky Error Block of Four Stamps * Stuart Katz
$56.35
1435a, Preprint Paper Fold Creates HUGE Color Shift Freak Error - Stuart Katz
$935.30
1254-57, Mint 5¢ Partial Reverse Printing Under Gum EFO Error * Stuart Katz
$70.50
1557, MNH 10¢ Partial Reverse Printing Under Gum Zip Block Error * Stuart Katz
$46.95
TD117 Var, RARE Imperforate Block of 4 - No Die Cutting * Stuart Katz
$495.00
1470, MNH 8¢ Color Shift Freaky Error Sheet of 50 Stamps * Stuart Katz
$465.30
1435a, MNH 8¢ Space RARE Strip With Double Perforations Freak Error Stuart Katz
$117.50
Wisconsin Centennial Sheet of Fifty 3 Cent Postage Stamps Scott 957
$14.95
Oregon Territory Centennial Sheet of Fifty 3 Cent Postage Stamps Scott 964
$14.95
986, MNH 3¢ Heavy Over Inking Plate Block EFO ERROR Freak - Stuart Katz
$140.95
Mississippi Territory Sheet of Fifty 3 Cent Postage Stamps Scott 955
$14.95
2607c, Mint NH 23¢ Imperforate Coil Pair Freak EFO Error ** Stuart Katz
$42.30
1472, MNH Color Shift Santa Sheet of 50 Stamps - Freak EFO Error - Stuart Katz
$371.30
1582, MNH 2¢ Misperfed Freak EFO Error Sheet of 100 Stamps - Stuart Katz
$112.75
1863, 22¢ Scarce Misperfed Bottom Margin Block Error Mint NH -- Stuart Katz
$37.55
1340, MNH 6¢ Hemisfair RARE Misperfed Error Block of Four - Stuart Katz
$56.40
702, Red Cross Shifted Well Up Into The Frameline Error Mint NH -- Stuart Katz
$117.50
C90, 31¢ Scarce Misperfed Error Pair of Airmail Stamps Mint NH - Stuart Katz
$28.15
1476, MNH 8¢ Scarce Misperfed Error Block of Four - Stuart Katz
$93.06
1576c, Mint NH 10¢ With All Colors Omitted Error EXTREMELY RARE! - Stuart Katz
$893.00
1508, MNH 8¢ Misperforated Error Top PL# Block of 20 - Stuart Katz
$235.00
C5, Mint VF NH 16¢ Very Well Centered -- Stuart Katz
$85.00
557, Mint NH VF 5¢ Roosevelt Block of Four - Stuart Katz
$99.00
555, Mint VF NH 3¢ HUGE JUMBO Margins! - Stuart Katz
$75.00
484, Mint XF LH 3¢ Plate Block of Six - A BEAUTY! -*- Stuart Katz
$75.00
2421a, Mint NH 25¢ Black Engraved Color Omitted Major Error -- Stuart Katz
$164.50
1478, MNH 8¢ Scarce Misperf And Color Shift Error Plate Block - Stuart Katz
$70.50
1560, 60b, MNH 10¢ Strip of 10 Black Missing & Gutter In Center - Stuart Katz
$465.30
1868, Mint NH 40¢ Diagonal Misperf Error Block of Four Stamps - Stuart Katz
$56.40
1474, MNH 8¢ Magnificent Black Color Shift Error With Normal - Stuart Katz
$611.00
320A, Mint Superb NH 2¢ Type II Pair - Stuart Katz
$350.00
1507, MNH 8¢ Misperforated Error Top PL# Block of 14 - Stuart Katz
$70.50
484, Mint XF LH 3¢ Plate Block of Six - A BEAUTY! -**- Stuart Katz
$75.00
1485a, MNH 8¢ Imperforate Between Error PL# Block of 6 Pairs - Stuart Katz
$705.00
1560, MNH 10¢ Misperforated Error Plate Block of 10 Stamps - Stuart Katz
$141.00
1541a, Mint NH 10¢ Large Misperfed Error Block - Minerals -- Stuart Katz
$117.50
1394, MNH 8¢ FULL Reverse Printing Under Gum Freak EFO Error * Stuart Katz
$46.95
1338, MNH Strip FULL Reverse Printing Under Gum Freak EFO Error * Stuart Katz
$93.95
1364, MNH 6¢ Partial Reverse Printing Under Gum Freak EFO Error * Stuart Katz
$46.95
1381, MNH 6¢ Partial Reverse Printing Under Gum Freak EFO Error * Stuart Katz
$70.50
1474, MNH 8¢ Terrific Black Color Shift Error With Normal - WoW - Stuart Katz
$140.06
1126, MNH 8¢ FULL Reverse Printing Under Gum Freak EFO Error * Stuart Katz
$70.50
1463, MNH 8¢ Partial Reverse Printing Under Gum Freak EFO Error * Stuart Katz
$70.50
Charlie Brown Booklet Pane of 20 First Class Stamps Scott 5030a - Stuart Katz
$46.89
Bethesda Fountain $25.50 Express Mail Sheet of 4 Postage Stamps Scott 5348
$495.00
Christmas Holiday Virgin & Child Booklet of 20 First Class Stamps Scott 4815b
$32.79
4019, 2006 $14.40 X-15 Plane Priority Mail Pane of 20 Stamps - Stuart Katz
$450.00
1548, Mint NH 10¢ Terrific Reverse Printing Under Gum Error - Stuart Katz
$89.30
1525, MNH 10¢ Misperf Shift Freaky Error Sheet of 50 Stamps - Stuart Katz
$653.30
1569-70a, Mint NH 10¢ Fold Over Freaky Error Space Block - Stuart Katz
$183.30
1338, MNH 8¢ Over Inking Freaky Error Sheet of 100 Stamps - Stuart Katz
$281.06
1564, MNH 10¢ Misperf Shift Freaky Error Sheet of 40 Stamps - Stuart Katz
$328.06
1126, Used 8¢ Misperf Shift Freaky Error Sheet of 72 Stamps - Stuart Katz
$371.30
1444, MNH 8¢ Misperfed And Tape Splice Freaky Error Sheet of 50 - Stuart Katz
$705.00
1118, MNH 8¢ Misperf Shift Freaky Error Sheet of 72 Stamps - Stuart Katz
$559.30
1690, Mint NH 13¢ Terrific Partial Reverse Printing Under Gum Error Stuart Katz
$70.50
1556, Mint NH 10¢ Terrific Partial Reverse Printing Under Gum Error Stuart Katz
$47.00
1705, Mint NH 13¢ Terrific Reverse Printing Under Gum Error - Stuart Katz
$70.50
2540b, Mint NH $2.90 Black Color Omitted Error With Normal - Stuart Katz
$371.30
Pacific 97 Testing Sheet of 40 Stamps With Fold Over Error - Stuart Katz
$234.95
1280 Var, Mint NH 2¢ Fold Over Error Created FULL GUTTER PAIR - Stuart Katz
$705.00
1551, Mint NH 13¢ Misperfed Freaky Sheet of 50 Error Stamps - Stuart Katz
$935.30
1033, Mint NH 2¢ Remarkable Freak Block of Stamps UNIQUE ERROR - Stuart Katz
$1,875.30
1856 Var, MNH 14¢ Misperfed Strip of Ten Stamps With Gutter Between Stuart Katz
$164.50
2723A, Scarce 11.2 X 11.5 Perforations Complete Sheet of 40 - Stuart Katz
$225.60
1578a, Mint NH 10¢ Sensational Color Shift Error Plate Block - Stuart Katz
$117.50
2092, Mint NH 20¢ Wetlands Ducks - Margin Copy Error - Stuart Katz
$37.55
219-29P4, XF Set of Card Proofs Includes 219D - Very Fresh Colors -- Stuart Katz
$550.00
637, Mint LH/NH 5¢ - Large Misperforation Error Block of Four * Stuart Katz
$56.40
677, Mint NH VF 8¢ Nebr Plate Block of Four CV $550.00 * Stuart Katz
$399.00
663, Mint NH VF 5¢ Kans Plate Block of Four CV $650.00 * Stuart Katz
$399.00
1505, Mint NH 10¢ Unbelievable Black Color Shift Error Plate Block - Stuart Katz
$282.00
1578a, Mint NH 10¢ Sensational Color Shift Error Plate Block -- Stuart Katz
$141.00
290, Used 10¢ XF/Superb Gem Quality Stamp - Stuart Katz
$125.00
1555a, Mint NH 10¢ Brown Color Omitted Error - RARE Plate Block - Stuart Katz
$1,316.00
1578a, Mint NH 10¢ Massive Color Shift Error Pair - Fantastic! - Stuart Katz
$47.00
1578a, Mint NH 10¢ Massive Color Shift Error Pair - Very Cool! - Stuart Katz
$47.00
1576, Mint OG 10¢ Misperforated Error Plate Block of 25 Stamps - Stuart Katz
$70.50
267, Mint HR 2¢ - Large Misperforation Error Block of Four * Stuart Katz
$117.50
1547, Mint NH 10¢ Nice Color Shift Error In Sheet of 50 Stamps - Stuart Katz
$141.00
2074, 20¢ Hard to Find Misperfed Error Stamp Mint NH - Stuart Katz
$28.15
C84-C100, 1972-1980 Airmail Commemorative Set of 18 MNH Stamps - Stuart Katz
$19.95
910a, Mint NH Double Impression of Czechoslovakia Error - RARE - Stuart Katz
$465.30
2518a, MNH VF Imperforate PL# 1111 Error Strip of 10 Stamps CV $275 Stuart Katz
$211.50
50 X SETS - Scott 909-21, 1943-44 Overrun Countries Issues Set of 13 Mint NH
$75.00
1726b-c, MNH 13¢ Strip of 5 Containing Both Color Omitted Errors - Stuart Katz
$611.00
2022a, Mint NH 20¢ Misperforated Error Block of Four - Red at Top - Stuart Katz
$37.60
2440 Var, Miscut 25¢ Love Sheet Creates Five Color Omitted Stamps - Stuart Katz
$1,875.30
2114, MNH 22¢ Miscut Error Pane Makes for 10 Full Gutter Pairs - Stuart Katz
$2,350.00
1355a, Mint NH Zip Block With Ochre Color Omitted RARE Error - Stuart Katz
$1,175.00
2369, MNH 22¢ Nice Color Shift Error With Normal stamp Too! - Stuart Katz
$18.79
368, Mint Superb NH 2¢ Imperforate Block of Four - Stuart Katz
$89.00
2500a, MNH 25¢ Diagonal Misperf Error Complete Sheet - AMAZING! - Stuart Katz
$893.00
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