United States

1394, Red Missing on 2 Stamps - Two Way Misperforated Error Zip Block of Six

$140.06

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2054, 20¢ Sensational Color Shift Error Denomination Missing * Stuart Katz

$47.00

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1433, 8¢ Dramatic Color Shift Error Zip Block - Amazing! Mint NH * Stuart Katz

$305.50

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1557, 10¢ Amazingly HUGE Color Shift Error Block of 4 Mint NH - Stuart Katz

$465.30

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1769, 15¢ Block Of Four With Full Gutter Between Stamps RARE * Stuart Katz

$376.00

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2073, 20¢ Wonderful Misperfed Error Block With Gutter * Stuart Katz

$75.15

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1560, 60b Var Full Horiz Gutter Between Stamps & Color Missing - Stuart Katz

$465.30

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1281, 3¢ PB Block Misplaced Pins Misperforation Error Mint NH * Stuart Katz

$47.00

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1393, 6¢ Fold Over Error Makes For Almost A Full Gutter Pair MNH * Stuart Katz

$164.50

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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

$187.95

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

$42.30

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2019-22, 20¢ Four Misperfed Error Stamps NICE! * Stuart Katz

$61.10

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3910m, Mint VF NH Orange Yellow Color Omitted Error With PSE Cert - Stuart Katz

$164.50

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2346 Var, New York In Red Almost Completely Missing Bock of Four - Stuart Katz

$329.00

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1867, 39¢ Misperfred Right Error Block Of Six Stamps? * Stuart Katz

$141.00

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2114, 22¢ Amazing Misperfed Error Block With Gutter * Stuart Katz

$47.00

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1473, 8¢ Terrific Color Shift Error Zip Block Of Four * Stuart Katz

$173.90

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C81, 21¢ Amazing Diagonal Misperforated Error Airmail Block Of 4 - Stuart Katz

$117.50

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701, Mint NH Double Paper Error VERY RARE! - Stuart Katz

$94.00

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1735, Large Misperforation ERROR PL# Block of 4 Stamps Mint NH - Stuart Katz

$47.00

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2066, Misperforated ERROR Alaska Plate Block PL# Captured on Stamp Stuart Katz

$141.00

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532, Mint XF LH Center Line Block With "Wilson" Perforations - Stuart Katz

$400.00

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2015, Large Misperforation With PL# Captured Plate Block ERROR - Stuart Katz

$117.50

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2536, 29¢ Scarce Large Color Shift Error Block With A Normal * Stuart Katz

$211.50

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1511, 10¢ Drastic Misperforation Shift Error Block Mint NH ** Stuart Katz

$93.06

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1557, 10¢ HUGE Color Shift Error Space Stamp PB W/Normal Mint NH * Stuart Katz

$258.50

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1461 Var 8¢ Olympics 99% of Black Color Omitted ERROR With Normal - Stuart Katz

$117.50

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1510, 10¢ Drastically Misperfed Error Plate Block Mint NH * Stuart Katz

$42.30

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2114, 22¢ Amazing Misperfed Error Plate Block * Stuart Katz

$61.10

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1549, 10¢ Scarce Perforation Shift Error Plate Block Mint NH - Stuart Katz

$70.50

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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

$37.60

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

$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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3535, PORKY PIG Special Die Cut Sheet Imperforate Single Stamp at Right

$14.00

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2880, Red "G" Postcard Rate of 20¢ Complete Sheet of 100 Stamps - Stuart Katz

$74.95

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90, Used 12¢ With Grill - VF With Red Cancel Cat $450.00 - Stuart Katz

$295.00

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RG125, Mint VF XXLH $10 Silver Tax Stamp Cat $225.00 -- Stuart Katz

$175.00

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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

$14.05

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1467a, Misperfed Error Sheet Showing Full Gutter Between Stamps - Stuart Katz

$1,410.00

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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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E13, Mint VF-XF NH 15¢ Special Delivery Block of Four Cat $300.00 - Stuart Katz

$175.00

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RW56, Lesser Scaup Federal Duck Stamp VF OG NH - Stuart Katz

$15.95

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398, Mint VF NH Large Block of Eight Stamps Cat $280.00 - Stuart Katz

$150.00

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578, 1¢ Mint NH VF/XF RARE Block of Four Cat $600.00++ - Stuart Katz

$350.00

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J79-87, Mint NH VF/XF PB's & Blocks/4 Complete Set Cat $370.00 - Stuart Katz

$295.00

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1096, 8¢ Very Scarce Reverse Printing ERROR With Normal Mint NH - Stuart Katz

$70.50

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5052a, VF NH PNC Imperforate Strip of Five Stamps RARE! - Stuart Katz

$799.00

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383V, Mint VF NH Imperforate Coil Strip of Four SCARCE! - Stuart Katz

$35.00

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2877, Misperfed ERROR Complete Sheet of 3¢ Stamps Shows Gutter - Stuart Katz

$465.30

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5036, Imperforate Plate Block ERROR - PFC Certificate Mint VF NH Stuart Katz

$277.30

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617, Mint VF Sheet of 50 1¢ Lexington Stamps Brookman $400.00 - Stuart Katz

$295.00

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2015, 20¢ Very Scarce Reverse Printing ERROR With Normal Mint NH - Stuart Katz

$47.00

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1845, 2¢ Block of 20 ERROR Stamps Which are Misperfed - Stuart Katz

$141.00

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526, Mint VF NH Plate Block of Six Stamps Cat $450.00 - Stuart Katz

$225.00

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C18, VF/XF NH 50¢ Zepp Airmail Block of Four Stamps Cat $300.00 - Stuart Katz

$175.00

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