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1390a, Mint NH 6¢ Large Massive Color Shift Error Block - Stuart Katz

$ 132 $ 79.2

#1926a "BLACK" (ENGR) INSCRIPTION OMITTED ERROR CV 0 BT3708

$ 85.8 $ 51.48

United States "To Error is Human" EFO Mistakes / Errors / Freaks / Oddities

$ 2.2 $ 1.32

Scott 833 Variety Mint Sheet Margin Pair (Harding) NH OG Vignette Shift EFO E

$ 17.6 $ 10.56

1420a, Mint VF NH Orange & Yellow Colors Omitted MAJOR RARITY - Stuart Katz

$ 418 $ 250.8

Lot of 8 EFO Imperforated Coil Pairs MNH OG VF CV 0 List of Catalog #'s Below

$ 92.4 $ 55.44

1683, Large Misperf Error 13¢ Telephone Stamp With Normal Mint NH - Stuart Katz

$ 16.67 $ 10

US 1¢ Washington/Franklin - Advertising Cover - Utica NY

$ 4.4 $ 2.64

2071, Mint NH 20¢ Rare Misperf Plate Block of Four Error - Stuart Katz

$ 74.8 $ 44.88

1425, Mint NH 6¢ Large Gutter Snipe Error Block of 8 Stamps - Stuart Katz

$ 70.35 $ 42.21

556, Mint LH 4¢ Martha RARE Misperf Error Block of Four Stamps - Stuart Katz

$ 154 $ 92.4

1035 - Misperf Error / EFO Pair COD "Change of Design" "Statue of Liberty" MNH

$ 11.43 $ 6.85

#2474B 3 PANES WHITE OMITTED MAJOR ERROR BM4161

$ 132 $ 79.2

US Error Stamp 1957 Religious Freedom In America #1099 3c MNH OG MISCUT

$ 5.5 $ 3.3

R65c 70c for ex pr w/efo perfs, f-vf cv 40.-

$ 16.71 $ 10.02

SCOTT# 1949 BK#142 20¢ RAM BOOKLET MISCUT BOTH PANES MINT N.H. PL.#19 SCARCE

$ 263.12 $ 157.87

1455, Mint NH Black Color Shift Error Block of Six Stamps - Stuart Katz

$ 39.6 $ 23.76

741, Mint NH 2¢ Misperfed Plate Block of 10 Stamps Error - Stuart Katz

$ 220 $ 132

640, Mint NH 8¢ RARE Printers Waste Block of Six Stamps - Stuart Katz

$ 198 $ 118.8

#1891a 18c 1981 "FLAG" STRIP / 3 IMPERF W/ PLATE #4 MAJOR ERROR VERY RARE HV1000

$ 791.12 $ 474.67

US STAMPS 1213 SACRAMENTO CALIF. HANDSTAMP USED F/VF 7225

$ 2.31 $ 1.38

TILTED BALTIMORE MARYLAND PRECANCEL ERROR ON WILSON 7C US STAMP

$ 60.42 $ 36.25

639 .07 McKinley Block Misperfed Block And Gutter Snipe. MNH.

$ 157.52 $ 94.51

#295 VAR. HIGH & LOW "TRAIN" VARIETY ERRORS BR1068

$ 110 $ 66

# 2054 20c Met Opera - dramatic color and perf shift - MNHOG - EFO Error

$ 35.2 $ 21.12

1397 Var, Mint NH 14¢ Unique Gutter Pair Error LaGuardia - Stuart Katz

$ 660 $ 396

987, Mint NH 3¢ UNIQUE Full Gutter Pair Error - Stuart Katz

$ 660 $ 396

1338, MNH Stunning Fold Over Error PL# Block of 25 Stamps WoW - Stuart Katz

$ 396 $ 237.6

2590, Unbelievable Misperfed Complete Sheet of 20 Stamps - Stuart Katz

$ 1320 $ 792

#1686i "BICENTENNIAL" SOUVENIR SHEET USA / 18¢ OMITTED ON "e" MAJOR ERROR BS2791

$ 418 $ 250.8

1690a, Mint XF NH 13¢ Light Blue Color Omitted ERROR Cat 0.00 - Stuart Katz

$ 110 $ 66

2344 Var, Red Color Missing From Top Stamp Mint NH VERY RARE! -- Stuart Katz

$ 132 $ 79.2

HERITAGE BREEDS FOREVER 55C STAMP SHEET OF 20 MNH OG EXCELLENT

$ 14.07 $ 8.44

US EFO Scott #1054 Coil Pair USED 1c Washington Major Misperf! 2

$ 3.96 $ 2.37

1928 Beacon Low-flying Plane Massive Blue Vignette Shift Error US Stamp MNH #C11

$ 17.59 $ 10.55

#2967 VAR. "MARILYN MONROE" MAJOR MULTIPLE COLOR SHIFT ERROR HV9558

$ 484 $ 290.39

#1901b 5.9c BICYCLE VF OG NH IMPERF COIL PAIR MAJOR ERROR CV 0+ BL8296R

$ 55 $ 33

2399A GOLD OMMITED ERROR MINT BLOCK OF 4 STAMPS NH (2399 A1)

$ 51.03 $ 30.61

1504a Error Green Red and Brown Omitted VF-XF OG NH SCV. 0 (JH 4/3/2020)

$ 348.48 $ 209.08

1229b, 5¢ VF Mint NH Imperforate Error Strip of Three - Stuart Katz

$ 242 $ 145.19

2607 23c USA flag coil misperf pair MNH

$ 4.18 $ 2.5

COMPLETE ROLL SCOTT #2115 IMPERF EFO ERROR AT LEAST 9 #2115F - PRICED TO SELL

$ 233.64 $ 140.18

US - 1970 - 8 Cents Deep Claret Dwight D. Eisenhower Miscut Small Stamp #1395 NH

$ 4.99 $ 2.99

#U536 DIE PRINT SHIFTED FAR INSIDE FOLD OVER TO THE BACKSIDE ERROR BU3354

$ 39.6 $ 23.76

2121b (BK147) Pane With Violet Color Omitted Error With PSE Cert - Stuart Katz

$ 286 $ 171.6

805b, Mint NH RARE Imperforate Pair in Block of 12 Stamps - Stuart Katz

$ 110 $ 66

1467a Large Color Shift ERROR Block - 8¢ Wildlife - Mint NH - Stuart Katz

$ 110 $ 66

2169 Var, Dry Printing 2¢ Sheet of 100 Stamps Error Mint NH - Stuart Katz

$ 110 $ 66

1733a, Mint NH 13¢ RARE Fold Over Error of 50 Stamps - Stuart Katz

$ 110 $ 66

1858, 18¢ Scarce Misperfed Error Margin Pair Mint NH - Stuart Katz

$ 26.35 $ 15.81

1293, Mint NH 50¢ Misperf Plate Block of Four Error - Stuart Katz

$ 48.4 $ 29.04

2623a, Mint NH 29¢ Color Shift Error Block of Four - Stuart Katz

$ 44 $ 26.4

1151, 4¢ Large Misperf Error Mint NH Seato Stamp - Stuart Katz

$ 44 $ 26.4

637, 5¢ Large Misperf Error Pair Mint NH Teddy Roosevelt - Stuart Katz

$ 43.95 $ 26.37

1179, Mint NH 4¢ Misperfed Error Block of Four Stamps W/Normal - Stuart Katz

$ 66 $ 39.6

507, Mint LH 7¢ Large Misperfed Error Block of Four - Stuart Katz

$ 171.6 $ 102.96

ERROR SCOTT#834, STAMP CALVIN COOLIDGE 30TH PRESIDENT PLATE BLK OF 20 MNH OG

$ 2200 $ 1320

2 Cent Stamped Envelope Error

$ 8.8 $ 5.28

1547c, Green Omitted Error On Commemorative USPS Panel RARE! - Stuart Katz

$ 171.6 $ 102.96

1709a, MNH Misperf Error PL# Block of 10 Stamps VERY RARE! - Stuart Katz

$ 220 $ 132

2514, Mint NH 25¢ Misperfed Error Sheet of 50 Stamps - Stuart Katz

$ 308 $ 184.8

1863 Var, Miscut Error Strip of 3 Almost an Imperf Pair Mint NH - Stuart Katz

$ 26.35 $ 15.81

1597a, 15¢ Transitional Imperforate Pair at Top Error - Stuart Katz

$ 43.95 $ 26.37

2062b, Mint NH Black Color Omitted Error Plate Block With Normal - Stuart Katz

$ 308 $ 184.8

Scott 1768a Christmas IMPERF ERROR Mint Block of 4 Stamps NH (Stock 1768-3)

$ 114.39 $ 68.63

US Sc 1555 used 1975 10c D.W. Griffith, brown color shift

$ 11 $ 6.6

1733 Var, MNH Block of 20 Appears as Imperforate Between Errors - Stuart Katz

$ 308 $ 184.8

1122, Mint NH 4¢ Misperf Error Block of Six Stamps - Stuart Katz

$ 198 $ 118.8

#3470 VAR. 34¢ 'FLAG" PANE OF 20 MAJOR DIE SHIFT ERROR HV6875

$ 528 $ 316.8

#1402A IMPERF COIL PAIR BM1932

$ 19.36 $ 11.61

#1907a-1908a (2) DIFFERENT IMPERF PAIRS MAJOR ERROR BR1468

$ 87.56 $ 52.53

US, 1947 Christmas Seal Block, White Ridge Below Blue Skyline, WX136, MNH

$ 11.07 $ 6.64

#1894-1895 (20) DIFF ERRORS MOUNTED ON 8 PAGES "FLAG OVER SUPREME COURT" BT2537

$ 308 $ 184.8

CE2 - Huge Blue Vignette Color Shift Error / EFO Center Line Block Mint NH

$ 26.21 $ 15.72

830, Mint NH 30¢ RARE Misperfed Plate Block Error - Unique? - Stuart Katz

$ 176 $ 105.6

J95 Var, Mint NH 7c - WIDE SPACING ERROR PAIR Cat 0.00 - Stuart Katz

$ 61.55 $ 36.93

1304C - 5c Misperf Error / EFO Change of Design "Washington" Mint NH

$ 6.59 $ 3.95

1734, 13¢ Misperfed Error Strip With Gutter Between Mint NH -- Stuart Katz

$ 43.95 $ 26.37

1509, HUGE Misperforated ERROR Sheet of 100 10¢ US Flag Stamps - Stuart Katz

$ 611.6 $ 366.96

1712 perf. shift Butterfly Swallowtail used on piece

$ 43.07 $ 25.84

# 715 10 cent Orange Yellow Washington Perf. shifted up Mint Never Hinged OG

$ 21.95 $ 13.17

2040, Mint NH 20¢ Misperforation Error Plate Block - Stuart Katz

$ 44 $ 26.4

1288d 15¢ Holmes misperf MNH

$ 2.63 $ 1.57

1584, Large Misperfed Error 3¢ Stamp Hard to find! Mint NH - Stuart Katz

$ 17.55 $ 10.53

805, MNH 1-1/2¢ Large Misperfed Prexi Error - Stuart Katz

$ 8.75 $ 5.25

2066, 20¢ Scarce Misperfed Error Alaska Stamp Showing Gutter MNH - Stuart Katz

$ 20.19 $ 12.11

C75, Mint NH 20¢ Scarce Large Misperfed Error USA Airmail - Stuart Katz

$ 22 $ 13.2

742, Mint NH 2¢ RARE Misperfed Error Block of Four Stamps - Stuart Katz

$ 57.2 $ 34.32

1166, MNH 4¢ UNIQUE Full Gutter Pair Major Error! - Stuart Katz

$ 660 $ 396

2410, Mint NH 25¢ Sheet Under Inking Error on Top Row - Stuart Katz

$ 347.6 $ 208.56

C35, MNH 15¢ Dry Printing Sheet of 50 Airmail Error Stamps - Stuart Katz

$ 435.6 $ 261.36

2096a, VF NH Imperforate Between Plate Block Error - 2-3 Exist - Stuart Katz

$ 396 $ 237.6

MOstamps - US #1856c Mint OG NH Pair Imperf Error with PSE Cert - Lot # MO-2922

$ 35.2 $ 21.12

Mexico #369 The 1914 Coat of Arms Imperforate - Printer's Waste MNH

$ 1.1 $ 0.66

1338u, EXTREMELY RARE Used 6c Flag vertical imperforate between error pair

$ 220 $ 132

2492 32¢ Rose Imperforate and With Color Omitted Vertical Pair - Stuart Katz

$ 66 $ 39.6

US Sc# 4125h *MINT OG* { RARE "FOREVER COLOR OMITTED" VAR ERROR } LIBERTY BELL

$ 484 $ 290.39

#R57a VAR. "50¢ LEASE" W/ PRE-PRINT PAPER FOLD ERROR; SMALL TEAR @ LEFT BP0087

$ 22 $ 13.2

#702 VAR "RED CROSS" VIGNETTE SHIFT ERROR PL # BLK/4 (CROSS INTO NURSE) BT1309

$ 330 $ 198

EFO 623 OFFSET OF DESIGN ON GUM SIDE. MLH

$ 13.2 $ 7.91