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3031 Var Two Different Color Varieties Look Like Color Omitted PF * Stuart Katz

$470.00

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C88, 26¢ Full Reverse Printing Under Gum Error Zip Block W/Normal * Stuart Katz

$183.30

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2703a, 29¢ Severely Over Inked Minerals Zip Block * Stuart Katz

$141.00

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1950, 20¢ Misperfed Error Plate Block FDR Stamps * Stuart Katz

$47.00

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1727, 13¢ Spectacular Color Shift Error With Normal Stamp * Stuart Katz

$23.45

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1455, Large Black Color Shift Error Zip Block Mint NH * Stuart Katz

$56.40

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2062b, Mint VF NH Color Omitted ERROR Block of Four With Normal - Stuart Katz

Custom Sku: SK-16727

$187.95

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1563, 10¢ Misperforation Error With Inscription Missing! * Stuart Katz

$42.30

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Felix The Cat Fancy Cancellations & More Stunning Cover - Stuart Katz

$487.50

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1551, 10¢ Scarce Perforation Shift Error PR Showing Gutter Mint NH * Stuart Katz

$70.50

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C94a, PL# In Two Different Colors Error? * Stuart Katz

$18.75

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2011, Reverse Printing Under Gum ERROR With Normal Mint NH - Stuart Katz

$47.00

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1727, HUGE Color Shift ERROR 13¢ Recording Stamp With Normal MNH Stuart Katz

$18.79

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1436, Multiple Color Shift ERROR 8¢ Dickinson With Normal Mint NH - Stuart Katz

$70.50

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2980a, Mint VF NH Block Black Color Omitted Error APS Cert - Stuart Katz

$846.00

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1949a Two 20¢ Misperforated ERROR Panes In Complete Booklet - Stuart Katz

Custom Sku: SK-07515

$37.60

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RW85, $25 Mallards 85th Anniversary Single Stamp Mint NH - Stuart Katz

Custom Sku: rw85

$79.95

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RW30, Mint XF NH $3 Duck Plate Block of Four Stamps Cat $450.00 - Stuart Katz

$300.00

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1931a, Very Dramatic Misperfed ERROR Plate Block Mint NH - WoW - Stuart Katz

$79.90

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483, Mint F/VF NH Block of Four & Pair Cat $150.00 - Stuart Katz

$75.00

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RW41, Mint VF Sheet of 30 $5 Duck Stamps CV $648.00 - Stuart Katz

$300.00

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497, Used 10¢ VF Coil Line Strip of Four Stamps CV $235+ - Stuart Katz

$120.00

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1150, Mint LH With Obstruction ERROR Unusual Item! - Stuart Katz

$37.55

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1592, RARE ERROR Sheet of 100 10¢ Right to Petition Stamps Mint NH - Stuart Katz

$470.00

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Enameline Heel & Edge Stain Libby & Estes Advertising Cover - Stuart Katz

$10.00

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Swft's Ham & Bacon Double Sided 1903 Advertising Cover - Stuart Katz

$14.00

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The Colonial Hotel Mt. Clemens, MI 1915 Advertising Cover - Stuart Katz

$14.00

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483, 3¢ Mint Superb NH Line Block of Eight Stamps Cat $200.00 - Stuart Katz

$150.00

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589, 8¢ Mint VF NH Block of Four Stamps Cat $230.00 - Stuart Katz

$99.00

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Multicolor Int'L Stock Food Adv Cover F & B With Vivid Enclosure - Stuart Katz

$99.99

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Multicolor Standard Rice Flakes Cereal Advertising Cover - Stuart Katz

$20.00

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Blue & Gold Colored Meyers Co. Beaver Falls, PA Advertising Cover - Stuart Katz

$14.00

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Multicolor Butter-Krust Bread Embossed Cartoon Advertising Postcard Stuart Katz

$14.00

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Sash, Doors & Blinds 4/2/1898 All Over Advertising Cover - Stuart Katz

$11.00

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C39, Misperforation Error Block of Six 6¢ Airmail Stamps Mint NH - Stuart Katz

$84.55

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2529, Color Shift & Misperforation ERROR Pairs With Normal WoW - Stuart Katz

$46.95

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1866, 37¢ Misperf Error Makes For Change Of Design With Normal - Stuart Katz

Custom Sku: SK-16358

$14.05

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528, Mint VF NH Monogram Top Plate Block of Six Stamps Cat $300.00 - Stuart Katz

$150.00

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496, Mint Superb NH GEM 5¢ Coil Pair - Stuart Katz

$95.00

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390, Mint XF/Superb NH 1¢ Nicely Centered Coil Pair - Stuart Katz

$195.00

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344V, Mint XF NH 2¢ Vertical Imperforate Coil Pair Cat $50.00+ --- Stuart Katz

$40.00

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441, Mint XF/Superb NH 1¢ Nicely Centered Coil Pair - Stuart Katz

$65.00

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70, Used 24¢ VF/XF Scarce Well Centered Stamp Cat $300.00 - Stuart Katz

$295.00

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25, Used 3¢ XF Very RARE Centered So Nice! - Stuart Katz

$400.00

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Large Tagging Omitted Collection Mint Never Hinged - Cat $394.50 - Stuart Katz

$150.00

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590, VF LH 9¢ Fresh Plate Block of Four Stamps Cat $150.00 - Stuart Katz

$89.00

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450, Mint 2¢ VF OG NH Scarce Coil Line Pair Cat $550.00 - Stuart Katz

$300.00

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508-9, 512, Mint VF+ OG NH Blocks of Four FRESH - Cat $268.00 - Stuart Katz

$165.00

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