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2578, 29¢ Two Way Misperforation Error Christmas Stamp With Normal * Stuart Katz
$42.30
2014, Partial Reverse Printing Under Gum Error Sheet of 50 - Stuart Katz
$141.00
Classic American Aircraft Sheet of Twenty 32 Cent Stamps Scott 3142a
$12.95
J94 Var, Mint Dry Gum Variety - Fairly Scarce! Cat $70.00 - Stuart Katz
$40.00
1446, Mint NH 8¢ Drastically Misperforated Error Block W/Normal - Stuart Katz
$56.40
617, VF Mint NH Scarce Top Sheet of 50 1¢ Stamps Brookman $400.00 - Stuart Katz
$275.00
1547c, VF NH 10¢ Green Color Omitted Error With APS Cert Stuart Katz
$376.00
1472, Mint 8¢ Misperfed ERROR Block of Four Santa Stamps - Stuart Katz
$47.00
575, Mint XF NH Left Side Plate Block of Six Stamps A GEM! -- Stuart Katz
$90.00
C125b, Mint VF NH Light Blue Color Omitted Error APS Cert - Stuart Katz
$446.50
QE2a Mint NH VF Plate Block of Six - Dry Printing CV $135.00 Stuart Katz
$75.00
3830De 37¢ Egret "USPS" Microprinted on Bird's Breast Cat $110.00 - Stuart Katz
$45.00
622-23, Two VF NH Plate Blocks of Six BEAUTIES! Cat $625.00 - Stuart Katz
$450.00
1285, Large Misperforation ERROR Block of 8¢ Einstein Stamps - Stuart Katz
$46.95
RW30, Mint XF NH DUCK Plate Block of Four Cat $450.00 - Stuart Katz
$275.00
1205, Large Misperforation Scarce ERROR Block of 4¢ Stamps MNH - Stuart Katz
$70.50
1591, MNH 9¢ U.S. Capital Misperforation ERROR Strip of 3 Stamps - Stuart Katz
$14.10
1382, 6¢ Mint NH Large Color Shift Error Football Stamp - Stuart Katz
$23.45
2075, RARE ERROR Sheet of 50 20¢ Stamps Credit Union Mint NH - Stuart Katz
$470.00
C116 Complete Sheet of 50 FR. Junipero Serra 44 Cent Airmail Stamp - Stuart Katz
$69.95
2979, 32¢ Carousel Horses Complete Sheet of 20 Stamps - Stuart Katz
$11.95
426, Mint NH Plate Block With "PINK" Aniline Back VERY RARE! - Stuart Katz
$400.00
2579a Var SHEET OF 50 - IMPERF PAIRS & DOUBLE PERF ERROR Cat $4,375.00+
$1,645.00
All Over Back Gold Medal Flour Advertising Cover With Enclosure - Stuart Katz
$14.00
The Plumbers Trade Journal 1904 Advertising Cover - Stuart Katz
$6.00
1930 Gray Horse, OKLA RARE Horse Fancy Cancel Registered Cover -- Stuart Katz
$487.50
559, Mint XF/Superb NH 7¢ JUMBO - Well Centered Stamp! - Stuart Katz
$75.00
General Upholsterers ALL OVER 3/15/1922 Advertising Cover - Stuart Katz
$9.00
C5, Mint H/NH VF/XF Block of Four Airmail Stamps Cat $360.00 - Stuart Katz
$225.00
OK Brand of Beans 1893 Rochester, NY Advertising Cover - Stuart Katz
$9.00
Coe Electrical Contracting All Over Yellow 1932 Advertising Cover - Stuart Katz
$11.00
567, RARE XF 20¢ "Worden" Wash, DC First Day Cover Cat $600.00 - Stuart Katz
$350.00
All Over J.A. Fay & Co Patent Woodworking Machines Advertising Cover Stuart Katz
$14.00
Meyer's Iron Frame Piano Advertising Cover - Stuart Katz
$14.00
2114, RARE Misperforation Error P.B. With Gutter! Mint NH - Stuart Katz
$70.50
C92a, 31¢ Large Color Shift Error Makes For Doubling Of Design - Stuart Katz
$46.95
298, Used XF 8¢ Panama Canal Stamp GEM QUALITY - Stuart Katz
$75.00
1731c, MNH With All Colors Omitted Major Error In Pair - Stuart Katz
$705.00
2062b, Mint NH Black Color Omitted Error Plate Block With Normal - Stuart Katz
$329.00
441, Mint Superb NH 1¢ Nicely Centered Coil Pair - Stuart Katz
$150.00
483, Mint Superb OG NH Plate Block of Six Stamps Cat $200.00 - Stuart Katz
$169.00
390, Mint VF NH 1¢ Coil Line Pair Cat $72.50 - Stuart Katz
$40.00
149, Used 7¢ XF GEM With JUMBO Margins Stunning Stamp! - Stuart Katz
$140.00
152, Used 15¢ VF Very Light Cancel Well Centered Cat $210.00 - Stuart Katz
$190.00
1304, Mint NH 5c Pair - RARE MISCUT & MISPERFORATION ERROR - Stuart Katz
$47.00
C81, 21¢ Airmail With Tagging Shift Error Looks Like 2X Impression - Stuart Katz
$70.50
1735, Major Fold Over ERROR Plate Block of Nine 15¢ Stamps MNH - Stuart Katz
$305.50
RW55, Snow Goose Federal Duck Stamp VF OG NH - Stuart Katz
$12.50
1307, RARE Reverse Printing Under Gum ERROR Complete Sheet of 50 - Stuart Katz
$282.00
C57, RARE Misperfed ERROR In Complete Sheet of 50 Stamps - Stuart Katz
$235.00
444, Used 2¢ Washington VF Quality Coil Stamp - Stuart Katz
$30.00
C81, RARE Reverse Printing Under Gum ERROR Plate Block Mint NH - Stuart Katz
$70.50
1238, Blue Color Missing From Stamp ERROR - VERY RARE! Mint NH - Stuart Katz
$705.00
583, MNH 2¢ Perforation 10 Plate Block Of Four Stamps Cat $110.00 -- Stuart Katz
$40.00
566, Mint 15¢ VF NH Liberty Block of Six Stamps Cat $210.00 - Stuart Katz
$75.00
2897, 32¢ Complete Sheet of 100 Stamps Brookman $115.00 - Stuart Katz
$59.95
White House Tea & Coffee Double Sided Advertising Cover - Stuart Katz
$13.00
151, Used 12¢ - Lightly Cancelled Cat $210.00 -- Stuart Katz
$50.00
RK28, $2 Consular Service Revenue Stamp Cat $125.00 - Stuart Katz
$85.00
RK9, 50¢ Consular Service Revenue Stamp Cat $150.00 - Stuart Katz
$85.00
1459a, Mint NH With Reverse Printing Under Gum ERROR WoW - Stuart Katz
$235.00
RW34, Mint XF NH Plate Block Old Squaws Federal Duck Stamp - Stuart Katz
$375.00
1732, 13¢ Misperfed ERROR Plate Block of 10 Stamps Captain Cook MNH Stuart Katz
$136.30
532, Superb NH 2¢ Left Side Plate Block of Six Stamps - Stuart Katz
$500.00
2169, Major Fold Over ERROR Sheet of 100 2¢ Stamps WoW - Stuart Katz
$141.00
RW81A, Canvasback Federal Duck Stamp Self-Adhesive Pane - Stuart Katz
$44.95
702, Red Cross is Shifted Far to the Right Block With Normal - Stuart Katz
$188.00
RW72A, $15 Hooded Manganser DUCK Stamp Self-Adhesive Pane - - Stuart Katz
$32.95
1690, Reverse Printing Under Gum ERROR Plate Block Mint NH - Stuart Katz
$47.00
677, Mint XF NH Plate Block 8¢ Nebraska Cat $550.00 - Stuart Katz
$450.00
117, Used 12¢ Red and Black Color Cancels Cat $270.00 - Stuart Katz
$99.00
RW21, Artist Signed Harvey Sandstrom (deceased) Duck Stamp VF NH - Stuart Katz
$225.00
RW71, $15.00 Redheads Duck Stamp VF NH - Stuart Katz
$24.95
266-67, Mint F/VF NH Type II & III Combination Strip Cat $752.00 -- Stuart Katz
$350.00
2540, $2.90 Priority Mail Misperforation Shift ERROR Plate Block -- Stuart Katz
$282.00
2590, Large Misperforated ERROR $1 Saratoga Plate Block MNH - Stuart Katz
$164.50
RW82A, 2016 Ruddy Duck Stamp Self-Adhesive Pane - Stuart Katz
$64.95
2590, Large Misperforated ERROR $1 Saratoga Plate Block MNH -- Stuart Katz
$164.50
1015, Scarce Misperforated ERROR Block of Six Stamps Mint NH - Stuart Katz
$51.70
4439, MNH VF Sheet $18.30 Bixby Creek Bridge Express Mail Stamps Stuart Katz
$550.00
1934 Color Shift ERROR Zip Block of 4 - 18¢ Frederic Remington - Stuart Katz
$70.50
2201b, Black Color Omitted Booklet of 2 ERROR Panes CV $100 - Stuart Katz
$19.99
1879a, 18¢ Flowers Misperforated ERROR Plate # Block of 16 Stamps - Stuart Katz
$371.30
2566b, Mint NH 29¢ Comedians Color Omitted Booklet Pane ERROR -- Stuart Katz
$305.50
2121b, Mint NH 22¢ Sea Shells Color Omitted Booklet Pane ERROR -- Stuart Katz
$305.50
1477, Large Misperforation Shift ERROR Plate Block of Four Mint NH - Stuart Katz
$70.50
1690, 13¢ Bicentennial Dark Blue Color Shift ERROR PL# Block of 20 Stuart Katz
$235.00
1804, Large Misperforation ERROR PB of 12 Stamps Black Heritage - Stuart Katz
$141.00
496, Mint VF NH 5¢ Coil Line Pair Cat $65.00 - Stuart Katz
$25.00
1767a, Misperforation Shift ERROR Plate Block of 16 Stamps 15¢ Trees Stuart Katz
$376.00
1845, Misperforated ERROR 2¢ Plate Block of 12 Stamps - Stuart Katz
$42.30
J63 Mint VF-XF NH 3¢ Plate Block of Six Stamps Cat $275.00 - Stuart Katz
$225.00
2104, Misperforation Shift ERROR PB of 20 - 20¢ Family Unity - Stuart Katz
$329.00
2015, RARE Reverse Printing Under Gum Plate Block of Four Stamps - Stuart Katz
$164.50
2527a, Outstanding Foldover ERROR 29¢ Rose Booklet Pane - Stuart Katz
$282.00
2979a, 32¢ Carousel Horses Misperforation ERROR Plate Block - Stuart Katz
$141.00
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