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1063, Mint NH 3¢ Misperf Shift Error Block of Four - Stuart Katz

$ 44 $ 26.4

1436, Misperf, Color Shift & Pre Printing Paper Fold Error Sheet WoW Stuart Katz

$ 787.6 $ 472.56

2361a, 22¢ Black Litho Color Omitted MAJOR Error XF NH - Stuart Katz

$ 330 $ 198

2110, MNH 22¢ Scarce Misperfed Error Sheet of 50 Stamps - Stuart Katz

$ 660 $ 396

1067, MNH 3¢ Armed Forces Spectacular Misperforation Error - Stuart Katz

$ 13.15 $ 7.89

1822, RARE Misperf Error 15¢ Zip Block Mint NH - Stuart Katz

$ 52.8 $ 31.67

825, MNH (gum skip) 20¢ Misperfed High Value Prexi Error - Stuart Katz

$ 11.39 $ 6.83

1291, Huge Misperf Error Pair 30¢ Dewey Stamps Mint NH - Stuart Katz

$ 22 $ 13.2

1938a, 18¢ Large Black Color Shift Error Pair With Normal * Stuart Katz

$ 26.4 $ 15.83

NE Precancel: Omaha NE #1058-61 Bureau Issue; EFO; Paste-up Str/4; MH/MNH

$ 263.99 $ 158.39

15c Fort McHenry Flag Coil Extra Red Stripe Error Freak Oddity Stamp MINT #1618C

$ 5.27 $ 3.16

#2130b IMPERF ERROR STRIP W/ PLATE #3 BULK RATE INSCRIBED IN RED CV 0 BQ1237R

$ 77 $ 46.2

UN Secretary-General Dag Hammarskjold Color Inverted Error US Stamp Set MINT NH!

$ 2.19 $ 1.31

EFO 1064 FULL GUTTER CORNER MARGIN NEXT SHEET + BLOCK FROM OTHER SIDE OF SHEET

$ 22 $ 13.2

#BK171a "LIGHTHOUSES" 4 PANES WITH WHITE COLOR OMITTED ERROR BT4509

$ 330 $ 198

1414, MNH 6¢ Black Color Shift Makes Blurry Image Error W/Normal - Stuart Katz

$ 13.15 $ 7.89

1958 US #1036b - 4c Lincoln Miscut Booklet Panes, Plates #26593 / 26594, Mint NH

$ 12.32 $ 7.39

#1436a "DICKINSON" BLACK & OLIVE GREEN OMITTED MAJOR ERROR - OG NH - HV4766

$ 462 $ 277.2

1031 1Cent Washington With Full Gutter And 70% Of Another Stamp Mint Never Hinge

$ 110 $ 66

3492b, MNH 99% of Black Color Missing from Right Side of Pane - Stuart Katz

$ 132 $ 79.2

1519a 10c Flag imperf pair MNH

$ 10.34 $ 6.2

1055c, Mint NH Imperforate Error Strip/3 Riverdale, MO Precancel - Stuart Katz

$ 242 $ 145.19

1990 25c Scott# 2474a Unfolded BP W/PL#4 W/no Gap in Center VF NH Rare

$ 38.72 $ 23.23

1067, Mint NH 3¢ Misperfed Error Plate Block of Four - Stuart Katz

$ 110 $ 66

2703a, 29¢ Severely Over Inked Minerals Plate Block With Normal * Stuart Katz

$ 250.8 $ 150.47

1139, MNH 4¢ Scarce Misperfed Error Benjamin Franklin NO RESERVE! - Stuart Katz

$ 0 $ 0

1424, MNH 6¢ Scarce Misperfed Error Douglas MacArthur NO RESERVE! - Stuart Katz

$ 0 $ 0

#1625a 13c 13 Star Flag EFO Imperforated Coil Pair MNH OG VF CV

$ 13.2 $ 7.91

US SCOTT #2256a IMPERF PAIR ERROR MINT NH SCV 0 (9/3/21 GP)

$ 228.8 $ 137.28

1597e, Imperforate PL# Strip of 20 Stamps CV 0.00+ - Stuart Katz

$ 66 $ 39.6

1542a, DULL Black Litho Colro Omitted MAJOR ERROR With Normal

$ 396 $ 237.6

1605, Mint NH 29¢ Fold Over Sheet With Gutter Pair Error UNIQUE! - Stuart Katz

$ 787.6 $ 472.56

2063 Var, Red Color Missing Mint VF NH With Normal - Stuart Katz

$ 347.6 $ 208.56

1240, Mint NH 5¢ Misperf And Pre Printing Paper Fold Block Error - Stuart Katz

$ 198 $ 118.8

C92d, Mint VF NH Multiple Colors Omitted Error PFC & PSE Certs - Stuart Katz

$ 1315.6 $ 789.35

1616- 9c Huge Left Misperf Error / EFO Pair "Capitol" Mint NH (Stk4)

$ 6.15 $ 3.69

1860, MNH - RARE PERFORATION SHIFT ERROR BLOCK OF 20 STAMPS & Sng - Stuart Katz

$ 87.95 $ 52.77

#2474a BLKT PANE 25¢ "LIGHTHOUSE" COLOR SHIFT MARJOR ERROR CAUSING C.O.D. BR3205

$ 65.56 $ 39.33

#2431a PAIR "EAGLE & SHIELD" DIE CUTTING OMITTED BETWEEN ERROR CV 0 BT6571

$ 132 $ 79.2

1394 & 1402 8¢ Eisenhower misperfs MNH

$ 1.75 $ 1.05

1402 8¢ Eisenhower coil misperf pair MNH

$ 2.63 $ 1.57

#2635a Plate Block Black Omitted Superb NH Singles CV 00. (GP2)

$ 2640 $ 1584

USA 295 MINT NH BLOCK OF FOUR VF++ "FAST TRAIN"

$ 264 $ 158.4

US EFO Scott #1408 8c Ike 5 booklet singles major misperf Used!

$ 6.6 $ 3.95

1393D, Mint NH 7¢ Misperforation Error Pair - Ben Franklin - Stuart Katz

$ 17.55 $ 10.53

1455, Mint NH 8¢ Nice Black Color Shift Error Strip of Five Stamps - Stuart Katz

$ 30.8 $ 18.48

1280c, Mint NH 2¢ Miscut Error Booklet Pane With Shiny Gum - Stuart Katz

$ 26.35 $ 15.81

1287, Mint NH 13¢ JFK Misperfed Error Strip of Three Stamps - Stuart Katz

$ 35.2 $ 21.12

2919a, Shifted Die Cut Error Booklet Pane of 18 Stamps - Stuart Katz

$ 35.15 $ 21.09

1858 18¢ Mason misperf MNH

$ 2.86 $ 1.71

717, 2¢ RARE Misperf Error Pair Mint NH Arbor Day - Stuart Katz

$ 35.15 $ 21.09

#2508-2511b Black Color Omitted (GP2)

$ 154 $ 92.4

US 1972 8c Peace Corps Poster Scott 1447 MNH Mint NH EFO ink stains LOTS OF INK!

$ 14.95 $ 8.97

1291, MNH 30¢ Misperfed Block of 100 Error Stamps- Scarce - Stuart Katz

$ 259.6 $ 155.76

1846, MNH 3¢ Misperfed Error Sheet of 100 Stamps - Stuart Katz

$ 259.6 $ 155.76

2103, MNH 20¢ Misperfed Error In Sheet of 40 Stamps - Stuart Katz

$ 259.6 $ 155.76

1758, Large Misperforation ERROR PB of panel of 40 Stamps 15¢ Photography

$ 250.8 $ 150.47

1720a, MNH 13¢ HUGE Misperfed Error Block of Four - Stuart Katz

$ 66 $ 39.6

#1340a Mint, XF OG NH w/ PF Cert., SCV 0 (GP2 11/20/19)

$ 457.6 $ 274.56

3138, 32¢ Die Cutting Omitted on First Day Cover! - Stuart Katz

$ 87.12 $ 52.27

Natural History Haida Ceremonial Canoe Color Frame Shift Errors Stamp MINT #1389

$ 2.63 $ 1.57

499 Underinked!

$ 6.6 $ 3.95

2833b, Mint NH - 29c Flowers RARE Imperforate Booklet Pane ERROR -- Stuart Katz

$ 316.8 $ 190.08

2540b, .90 Eagle Black Engraved Color Omitted ERROR With Normal - Stuart Katz

$ 2420 $ 1452

2533, Mint NH Large Misperf Error Vermont Plate Block - Stuart Katz

$ 154 $ 92.4

1618C 15c Americana EFO MISPERF ERROR coil Roll of 64 VF NH 1978

$ 158.4 $ 95.04

1383 Var, Mint NH 6¢ Blue Color Missing From Bottom Stamp - Stuart Katz

$ 435.6 $ 261.36

#1057d STR/6 LINE PAIR; PSE CERT TAGGED SMALL HOLES (LOOK MAGAZINE COIL) BR8954

$ 435.6 $ 261.36

1280 - 2c Misperf Error / EFO Block of 10 "Frank Lloyd Wright" Mint NH

$ 7.91 $ 4.74

SALE! Eagle D Rate Vertically Misplaced Perforations MISPERF ERROR MINT NH #2112

$ 2.63 $ 1.57

#702 VAR. "RED CROSS" MAJOR COLOR SHIFT ERROR (10) DIFF. POSITIONS BS7754

$ 77 $ 46.2

1022 Misperf Error / EFO Pair "American Bar Association" 75th Anniv. Mint NH

$ 11.43 $ 6.85

US Booklet BK227 with missing pane

$ 22 $ 13.2

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

$ 132 $ 79.2

UX39d 2c on 1c Jefferson postal card inverted surcharge

$ 4.3 $ 2.58

TURKMENISTAN # 8 DOUBLE ERROR

$ 2.63 $ 1.57

WYSTAMPS 1906 MISPERFED 17¢ ELECTRIC AUTO PAIR, MINT NEVER HINGED, GREAT FREAK!

$ 3.51 $ 2.1

1789a, MNH 15¢ BIG Color Shift Error Olympics Block of Six - Stuart Katz

$ 66 $ 39.6

#1394 "EISENHOWER" BLOCK OF 4 REPRINT WITHOUT TAGGING ERROR BT7460

$ 132 $ 79.2

#2003a "US-NETHERLANDS" IMPERF PAIR MAJOR ERROR W/ SELVAGE AT LEFT BQ1152

$ 351.12 $ 210.67

#1519 10c Flag EFO Misperforated Strip of 5 MNH OG VF "Include New Mount"

$ 15.84 $ 9.5

P697 US Stamp BOB Local 87L8 Bank & Insurance Notice Delivery Office MNHNG Nice*

$ 28.9 $ 17.34

#2014a "INT'L PEACE GARDEN" BLACK (ENGR.) OMITTED MAJOR ERROR BQ1196

$ 131.56 $ 78.93

1420, MNH 6¢ HUGE Misperfed Error Plate Block of Four - Pilgrims - Stuart Katz

$ 171.6 $ 102.96

2615a, Mint NH 29¢ RARE Misperf Error Block of Ten - Stuart Katz

$ 171.6 $ 102.96

1318, MNH Pre Print Paper Fold & Color Shift Error Plate Block - Stuart Katz

$ 154 $ 92.4

1622, MNH 13¢ RARE Fold Over Error Full Sheet of 100+ Stamps - Stuart Katz

$ 171.6 $ 102.96

2178, MNH 17¢ Terrific Dry Printing Error Sheet of 100 Stamps - Stuart Katz

$ 171.6 $ 102.96

1759, MNH 15¢ BIG Color Shift Error Mars Plate Block of Four - Stuart Katz

$ 154 $ 92.4

U.S. #2285b var Mint NH - 1988 25c Owls

$ 88 $ 52.8

1577 MNH 10c Banking Issue. Penny's copper color SHIFT.

$ 1.31 $ 0.78

US Stamps Errors Freaks EFO Sc# 634 Mint OG Block 20 & 806a Phantom Plate #'s

$ 175.99 $ 105.59

1395D, Mint NH 8¢ Misperf And Miscut Error Booklet Pane - Stuart Katz

$ 110 $ 66

C81, Mint NH 21¢ Blue Color Shifted Error Airmail Stamp - Stuart Katz

$ 74.8 $ 44.88

EFO CVP31 ERROR PAIR WITHOUT DENOMINATION MAJOR ERROR

$ 110 $ 66

1467a, Mint NH 8¢ Misperf Shift Error Block of Four Stamps - Stuart Katz

$ 110 $ 66

1763a, MNH 15¢ BIG Color Shift Error Owls Zip Block of Four - Stuart Katz

$ 35.2 $ 21.12

2177, 15¢ RARE Misperf Error Block Mint NH Buffalo Cody - Stuart Katz

$ 52.75 $ 31.65

#R48 VAR. "25¢ POWER OF ATTY" W/ PRE-PRINT PAPER FOLD ERROR BP0084

$ 33 $ 19.8

#2421a "25¢ BILL OF RIGHTS" BLACK 90% OMITTED MAJOR ERROR CV 5.00 BQ1142

$ 55 $ 33