United States

1443a, MNH Color Shift ERRORS - Two Diff Blocks of Four Stamps - Stuart Katz

$56.40

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410, Mint VF NH Pair, Paste-up Pair and Single Stamp Cat $78.00+ - Stuart Katz

$45.00

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C82a, 11¢ Miscut and Imperforate Coil Pair ERROR - Mint NH - Stuart Katz

$164.50

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1394, Misperforated ERROR Block of 38 Stamps - Mint NH - Stuart Katz

$70.50

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1557. Red & Blue Color Shift ERROR in Full Sheet of 50 Stamps - Stuart Katz

$465.30

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RW32, Mint NH Duck Plate Block- SUPERB QUALITY Cat $500.00 - Stuart Katz

$325.00

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538a, Mint XF NH Imperforate between pair Cat $125.00+ - Stuart Katz

$95.00

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RW66, Greater Scaup DUCK Stamp VF OG NH - Stuart Katz

Custom Sku: rw66

$26.95

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1158, Looks Like Imperforate ERROR Row of Stamps Mint NH - Stuart Katz

$376.00

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1504a, Green & Red Brown Colors Omitted ERROR Mint VF NH Cat $675.00 Stuart Katz

$423.00

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1735b, VF NH "A" Stamp Imperforate Between ERROR Hard to Find! - Stuart Katz

$371.30

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4640b, Die Cutting Omitted Major ERROR Strip of Five Stamps - Stuart Katz

$376.00

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3674, 37¢ Greetings Misperforated ERROR PL# Block of 4 - Stuart Katz

$46.95

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538a, Mint NH VF Block of four Imperforate between - Cat $275.00 Stuart Katz

$150.00

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2114 22c Flag - Reverse printing on back ERROR PL# Block of Four - Stuart Katz

$70.50

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1926 Black Color Shift MAJOR ERROR - PL# Block - 18¢ Mint NH - Stuart Katz

$79.90

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O23 Mint OG LH 30¢ Official Block of Four - Cat $1,250.00 - Stuart Katz

$250.00

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2015 Reverse printing Under Gum ERROR PL# Block of Four - Stuart Katz

$164.50

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1500 Ink Smear ERROR Block of 20 - 6¢ Electronics - Mint NH - Stuart Katz

$188.00

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1381 Multi Color Shift ERROR PL# Block of Four 6¢ Baseball - Stuart Katz

$282.00

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89 Used 10¢ VF-XF With JUMBO Margins Cat $350.00+ - Stuart Katz

$300.00

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1552, Mint 10c Dove - VERY RARE DIE CUTTING SHIFTED BLOCK OF FOUR - Stuart Katz

$89.30

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J52 Mint 1¢ Postage Due - F-VF OG NH With PSE Cert Cat $220.00 - Stuart Katz

$95.00

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3835 Complete Misperforated ERROR Sheet of 20 - 37¢ Dr. Seuss - Stuart Katz

$352.50

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1384m, MNH 6¢ Baltimore, MD INVERTED PRECANCEL ERROR CV $225 - Stuart Katz

$141.00

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RW66A, $15 Greater Scaup DUCK Stamp Self-Adhesive Pane - Stuart Katz

Custom Sku: rw66a

$25.00

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2540, MNH $2.90 Priority SCARCE MISPERFORATION ERROR PLATE BLOCK/6 Stuart Katz

$423.00

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1529, 10¢ SKYLAB - BLACK COLOR SHIFTED WAY UP MAJOR ERROR PLATE BLOCK

$169.20

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3054a, 32c Rose Imperforate PL# 5555 strip of 3 error Mint NH XF RETAIL $750.00

$352.50

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1919a, MNH - DENOMINATIONS MISSING AND GUTTER AT BOTTOM ERROR - Stuart Katz

$705.00

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1716a, MNH RED COLOR MISSING ERROR - LAFAYETTE

$211.50

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1542 Var HUGE GREEN AND BLACK DIAGONAL COLOR SHIFT ERROR STRIP OF TEN

$704.06

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3060a, YEAR OF THE RAT IMPERFORATE PAIR ERROR - RARE! - Stuart Katz

$282.00

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2541, RARE MISPERFED ERROR PLATE BLOCK - $9.95 EXP MAIL

$188.00

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Avery Label Testing Booklet Pane Of 18 Stamps - XF - VERY RARE! - Stuart Katz

$250.00

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1474a, BLACK LITHO OMITTED MAJOR ERROR VF NH Cat $475.00

$338.40

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1700 Misperforated ERROR Margin Copy - 13¢ Adolph S. Ochs - Stuart Katz

$37.55

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1833 Misperforated ERROR Block of Ten Stamps - 15¢ Learning - MNH - Stuart Katz

$89.30

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1381 HUGE Black Color Shift ERROR PL# Block of Four 6¢ Baseball - Stuart Katz

$164.50

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1555 Reverse printing Under Gum ERROR PL# Block of Four - Stuart Katz

$164.50

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1487 Misperforated ERROR PL# Strip of 16 Stamps - 8¢ Cather - MNH - Stuart Katz

$112.80

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J88 Mint Sheet of 100 - VF OG NH Cat $264.00 - Stuart Katz

$89.95

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CANAL ZONE 55s, MINT OG NH SPECIMEN OVPT - RARE!

$75.14

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O89, Mint 12¢ OFFICIAL - Fine OG - FRESH! Cat $275.00

$59.95

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E6, Mint 10¢ SPECIAL DELIVERY - VF OG VLH Cat $230.00

$125.00

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117, Used 12c - XF GEM - Nice large margins all around! Cat $140.00+

$125.14

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96, Used 10c VERY FINE - LOW PRICE! Cat $260.00

$99.14

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152, Used 15c - VF - NICE Cat $100.00+

$125.14

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