United States

1485, MNH 8¢ Misperforated Freaky Error Sheet of 40 Stamps * Stuart Katz

$559.30

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1288b, Mint NH SPECTACULAR MISPERFORATED PANE ERROR

$164.50

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1507, MNH 8¢ Two Way Misperforated Freaky Error Sheet of 50 Stamps * Stuart Katz

$705.00

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1471, MNH 8¢ Perf Shift Freaky Error Block of Four Stamps * Stuart Katz

$56.35

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1435a, Preprint Paper Fold Creates HUGE Color Shift Freak Error - Stuart Katz

$935.30

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1254-57, Mint 5¢ Partial Reverse Printing Under Gum EFO Error * Stuart Katz

$70.50

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1557, MNH 10¢ Partial Reverse Printing Under Gum Zip Block Error * Stuart Katz

$46.95

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TD117 Var, RARE Imperforate Block of 4 - No Die Cutting * Stuart Katz

$495.00

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1470, MNH 8¢ Color Shift Freaky Error Sheet of 50 Stamps * Stuart Katz

$465.30

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1435a, MNH 8¢ Space RARE Strip With Double Perforations Freak Error Stuart Katz

$117.50

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Wisconsin Centennial Sheet of Fifty 3 Cent Postage Stamps Scott 957

$14.95

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Oregon Territory Centennial Sheet of Fifty 3 Cent Postage Stamps Scott 964

$14.95

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986, MNH 3¢ Heavy Over Inking Plate Block EFO ERROR Freak - Stuart Katz

$140.95

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Mississippi Territory Sheet of Fifty 3 Cent Postage Stamps Scott 955

$14.95

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2607c, Mint NH 23¢ Imperforate Coil Pair Freak EFO Error ** Stuart Katz

$42.30

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1472, MNH Color Shift Santa Sheet of 50 Stamps - Freak EFO Error - Stuart Katz

$371.30

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1582, MNH 2¢ Misperfed Freak EFO Error Sheet of 100 Stamps - Stuart Katz

$112.75

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1863, 22¢ Scarce Misperfed Bottom Margin Block Error Mint NH -- Stuart Katz

$37.55

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1340, MNH 6¢ Hemisfair RARE Misperfed Error Block of Four - Stuart Katz

$56.40

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702, Red Cross Shifted Well Up Into The Frameline Error Mint NH -- Stuart Katz

$117.50

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C90, 31¢ Scarce Misperfed Error Pair of Airmail Stamps Mint NH - Stuart Katz

$28.15

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1476, MNH 8¢ Scarce Misperfed Error Block of Four - Stuart Katz

$93.06

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1576c, Mint NH 10¢ With All Colors Omitted Error EXTREMELY RARE! - Stuart Katz

$893.00

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1508, MNH 8¢ Misperforated Error Top PL# Block of 20 - Stuart Katz

$235.00

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C5, Mint VF NH 16¢ Very Well Centered -- Stuart Katz

$85.00

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557, Mint NH VF 5¢ Roosevelt Block of Four - Stuart Katz

$99.00

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555, Mint VF NH 3¢ HUGE JUMBO Margins! - Stuart Katz

$75.00

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484, Mint XF LH 3¢ Plate Block of Six - A BEAUTY! -*- Stuart Katz

$75.00

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2421a, Mint NH 25¢ Black Engraved Color Omitted Major Error -- Stuart Katz

$164.50

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1478, MNH 8¢ Scarce Misperf And Color Shift Error Plate Block - Stuart Katz

$70.50

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1560, 60b, MNH 10¢ Strip of 10 Black Missing & Gutter In Center - Stuart Katz

$465.30

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1868, Mint NH 40¢ Diagonal Misperf Error Block of Four Stamps - Stuart Katz

$56.40

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1474, MNH 8¢ Magnificent Black Color Shift Error With Normal - Stuart Katz

$611.00

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320A, Mint Superb NH 2¢ Type II Pair - Stuart Katz

$350.00

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1507, MNH 8¢ Misperforated Error Top PL# Block of 14 - Stuart Katz

$70.50

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484, Mint XF LH 3¢ Plate Block of Six - A BEAUTY! -**- Stuart Katz

$75.00

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1485a, MNH 8¢ Imperforate Between Error PL# Block of 6 Pairs - Stuart Katz

$705.00

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1560, MNH 10¢ Misperforated Error Plate Block of 10 Stamps - Stuart Katz

$141.00

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1541a, Mint NH 10¢ Large Misperfed Error Block - Minerals -- Stuart Katz

$117.50

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1394, MNH 8¢ FULL Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$46.95

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1338, MNH Strip FULL Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$93.95

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1364, MNH 6¢ Partial Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$46.95

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1381, MNH 6¢ Partial Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$70.50

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1474, MNH 8¢ Terrific Black Color Shift Error With Normal - WoW - Stuart Katz

$140.06

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1126, MNH 8¢ FULL Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$70.50

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1463, MNH 8¢ Partial Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$70.50

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Charlie Brown Booklet Pane of 20 First Class Stamps Scott 5030a - Stuart Katz

$46.89

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Bethesda Fountain $25.50 Express Mail Sheet of 4 Postage Stamps Scott 5348

$495.00

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Christmas Holiday Virgin & Child Booklet of 20 First Class Stamps Scott 4815b

$32.79

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4019, 2006 $14.40 X-15 Plane Priority Mail Pane of 20 Stamps - Stuart Katz

$450.00

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1548, Mint NH 10¢ Terrific Reverse Printing Under Gum Error - Stuart Katz

$89.30

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1525, MNH 10¢ Misperf Shift Freaky Error Sheet of 50 Stamps - Stuart Katz

$653.30

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1569-70a, Mint NH 10¢ Fold Over Freaky Error Space Block - Stuart Katz

$183.30

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1338, MNH 8¢ Over Inking Freaky Error Sheet of 100 Stamps - Stuart Katz

$281.06

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1564, MNH 10¢ Misperf Shift Freaky Error Sheet of 40 Stamps - Stuart Katz

$328.06

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1126, Used 8¢ Misperf Shift Freaky Error Sheet of 72 Stamps - Stuart Katz

$371.30

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1444, MNH 8¢ Misperfed And Tape Splice Freaky Error Sheet of 50 - Stuart Katz

$705.00

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1118, MNH 8¢ Misperf Shift Freaky Error Sheet of 72 Stamps - Stuart Katz

$559.30

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1690, Mint NH 13¢ Terrific Partial Reverse Printing Under Gum Error Stuart Katz

$70.50

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1556, Mint NH 10¢ Terrific Partial Reverse Printing Under Gum Error Stuart Katz

$47.00

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1705, Mint NH 13¢ Terrific Reverse Printing Under Gum Error - Stuart Katz

$70.50

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2540b, Mint NH $2.90 Black Color Omitted Error With Normal - Stuart Katz

$371.30

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Pacific 97 Testing Sheet of 40 Stamps With Fold Over Error - Stuart Katz

$234.95

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1280 Var, Mint NH 2¢ Fold Over Error Created FULL GUTTER PAIR - Stuart Katz

$705.00

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1551, Mint NH 13¢ Misperfed Freaky Sheet of 50 Error Stamps - Stuart Katz

$935.30

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1033, Mint NH 2¢ Remarkable Freak Block of Stamps UNIQUE ERROR - Stuart Katz

$1,875.30

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1856 Var, MNH 14¢ Misperfed Strip of Ten Stamps With Gutter Between Stuart Katz

$164.50

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2723A, Scarce 11.2 X 11.5 Perforations Complete Sheet of 40 - Stuart Katz

$225.60

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1578a, Mint NH 10¢ Sensational Color Shift Error Plate Block - Stuart Katz

$117.50

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2092, Mint NH 20¢ Wetlands Ducks - Margin Copy Error - Stuart Katz

$37.55

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219-29P4, XF Set of Card Proofs Includes 219D - Very Fresh Colors -- Stuart Katz

$550.00

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637, Mint LH/NH 5¢ - Large Misperforation Error Block of Four * Stuart Katz

$56.40

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677, Mint NH VF 8¢ Nebr Plate Block of Four CV $550.00 * Stuart Katz

$399.00

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663, Mint NH VF 5¢ Kans Plate Block of Four CV $650.00 * Stuart Katz

$399.00

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1505, Mint NH 10¢ Unbelievable Black Color Shift Error Plate Block - Stuart Katz

$282.00

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1578a, Mint NH 10¢ Sensational Color Shift Error Plate Block -- Stuart Katz

$141.00

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290, Used 10¢ XF/Superb Gem Quality Stamp - Stuart Katz

$125.00

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1555a, Mint NH 10¢ Brown Color Omitted Error - RARE Plate Block - Stuart Katz

$1,316.00

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1578a, Mint NH 10¢ Massive Color Shift Error Pair - Fantastic! - Stuart Katz

$47.00

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1578a, Mint NH 10¢ Massive Color Shift Error Pair - Very Cool! - Stuart Katz

$47.00

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1576, Mint OG 10¢ Misperforated Error Plate Block of 25 Stamps - Stuart Katz

$70.50

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267, Mint HR 2¢ - Large Misperforation Error Block of Four * Stuart Katz

$117.50

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1547, Mint NH 10¢ Nice Color Shift Error In Sheet of 50 Stamps - Stuart Katz

$141.00

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2074, 20¢ Hard to Find Misperfed Error Stamp Mint NH - Stuart Katz

$28.15

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C84-C100, 1972-1980 Airmail Commemorative Set of 18 MNH Stamps - Stuart Katz

$19.95

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910a, Mint NH Double Impression of Czechoslovakia Error - RARE - Stuart Katz

$465.30

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2518a, MNH VF Imperforate PL# 1111 Error Strip of 10 Stamps CV $275 Stuart Katz

$211.50

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50 X SETS - Scott 909-21, 1943-44 Overrun Countries Issues Set of 13 Mint NH

$75.00

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1726b-c, MNH 13¢ Strip of 5 Containing Both Color Omitted Errors - Stuart Katz

$611.00

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2022a, Mint NH 20¢ Misperforated Error Block of Four - Red at Top - Stuart Katz

$37.60

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2440 Var, Miscut 25¢ Love Sheet Creates Five Color Omitted Stamps - Stuart Katz

$1,875.30

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2114, MNH 22¢ Miscut Error Pane Makes for 10 Full Gutter Pairs - Stuart Katz

$2,350.00

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1355a, Mint NH Zip Block With Ochre Color Omitted RARE Error - Stuart Katz

$1,175.00

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2369, MNH 22¢ Nice Color Shift Error With Normal stamp Too! - Stuart Katz

$18.79

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368, Mint Superb NH 2¢ Imperforate Block of Four - Stuart Katz

$89.00

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2500a, MNH 25¢ Diagonal Misperf Error Complete Sheet - AMAZING! - Stuart Katz

$893.00

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