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#651 VAR. CARMINE LAKE SHADE XF OG NH WITH NORMAL (RARE) BU9207

$ 396 $ 237.6

USA F Rate additional stamp MISPERF GUTTER PAIR MNH

$ 22 $ 13.2

#1717 #1719 13c Skilled Hands Misperforated MNH OG VF #1

$ 15.84 $ 9.5

1596, MNH 13¢ Eagle Misperfed Error Plate Block of 12 Stamps - Stuart Katz

$ 131.12 $ 78.67

1972 Family Planning 8c Stamp #1455 MNH MISPERFORATION ERROR

$ 5.5 $ 3.3

1687, Huge Foldover 18¢ Souvenir Sheet - Eye Catching ERROR - Stuart Katz

$ 308 $ 184.8

2566b, Mint NH 29¢ Comedians Color Omitted Booklet Pane ERROR - Stuart Katz

$ 286 $ 171.6

C3, Mint VF NH 24¢ "FAST PLANE" Variety Very Nice Example! - Stuart Katz

$ 396 $ 237.6

Scott 279B & 332, 2c diagonally cut to use as a 1 cents, on envelope corner

$ 8.79 $ 5.27

#2582a VAR."1991 USA CHRISTMAS" P.W. BOOKLET PANE OF 4 IMPERF MAJOR ERROR BP4431

$ 131.56 $ 78.93

4141a 26c Panther Die Cut Omitted Pair Error MNH CV 0.00

$ 131.95 $ 79.17

#C70 VAR. 8¢ "ALASKA" MISPERF ERROR BLOCK BQ8836

$ 131.56 $ 78.93

1542 Variety, Printing Anomaly "O" Over "US" ERROR In Block of 9 - Stuart Katz

$ 220 $ 132

US Sc 5281 MNH. 2018 blue AIR MAIL forever sheet with printing/plate faults, VF

$ 132 $ 79.2

C81, MNH 21¢ HUGE Color Shift Error Plate Block of Four - Air Mail - Stuart Katz

$ 308 $ 184.8

909c, VF NH Red Over Black Reverse Printing Error With Normal - Stuart Katz

$ 26.4 $ 15.83

1611, Mint NH Large Misperf Shift Error Plate Block of Four - Stuart Katz

$ 259.6 $ 155.76

3868a, MNH Very RARE Die Cut Shift Error Part Sheet - Disney - Stuart Katz

$ 259.6 $ 155.76

USA #CVP91 upside-down printed ERROR stamp used on #6¾ cover from 2017

$ 8.75 $ 5.25

2114, Badly Over Inked PL# Block of Twenty 22¢ ERROR Stamps - Stuart Katz

$ 22 $ 13.2

825, MNH 20¢ Misperfed Plate Block of Six Error - PL# Captured - Stuart Katz

$ 132 $ 79.2

1354a, MNH Large Misperforation Error PB of 20 Stamps RARE! - Stuart Katz

$ 220 $ 132

2635, Mint NH 26¢ Sheet Solvent Smear Error on Bottom Row - Stuart Katz

$ 220 $ 132

1584, MNH 3¢ Very RARE Vertical Gutter Error Pair In Strip of 7 - Stuart Katz

$ 220 $ 132

2085a, MNH 20¢ Remarkable Fold Over Error In Block of 20 - YIKES! - Stuart Katz

$ 220 $ 132

1845, MNH 2¢ Ink Smear Full Sheet of 100 Stamps Scarce Error! - Stuart Katz

$ 220 $ 132

1690, MNH 13¢ RARE Misperf Error Full Sheet of 50 Stamps - Stuart Katz

$ 220 $ 132

us stamps errors Roll of 100 Earth stamp imperf

$ 457.6 $ 274.56

#U646a ENTIRE BLUE, GRAY OMITTED MAJOR ERROR CV 5.00 BN6491

$ 99 $ 59.4

2367, MNH 22¢ Large Color Shift Error Stamp - NO RESERVE! - Stuart Katz

$ 5.23 $ 3.14

1384c, 6¢ With Light Green Color Omitted Error W/Normal Mint NH -- Stuart Katz

$ 17.55 $ 10.53

#2458 10c Tractor Trailer EFO Misperforated MNH OG "Include New Mount"

$ 4.4 $ 2.64

2868a, Mint NH 29¢ Cranes RARE Misperfed Error Sheet - Stuart Katz

$ 435.6 $ 261.36

1584, MNH 3¢ Terrific Odd Printing Error Sheet of 100 Stamps - Stuart Katz

$ 435.6 $ 261.36

2238a, MNH 22¢ Scarce Misperfed Error Sheet of 50 Stamps - Stuart Katz

$ 347.6 $ 208.56

1384 Var, Atlanta, Ga Reverse Offset on Plate Block of Ten Error - Stuart Katz

$ 396 $ 237.6

2871, Mint NH 29¢ RARE Miscut Error Sheet of 50 Stamps - Stuart Katz

$ 347.6 $ 208.56

2051a, MNH 13¢ RARE Misperf Error Full Sheet of 50 Stamps - Stuart Katz

$ 523.6 $ 314.16

1471a, Mint NH 8¢ With Pink Color Omitted Error With Normal - Stuart Katz

$ 74.8 $ 44.88

1021, Mint NH 5¢ Misperf Shift Error Margin Block - Stuart Katz

$ 79.2 $ 47.52

1150, Mint NH 4¢ Misperf Shift Error Block Water Conservation - Stuart Katz

$ 83.6 $ 50.16

US SC. R28c .05 CENT PLAYING CARD STAMP USED CAT. .00 #2 PG33

$ 7.04 $ 4.22

1280, Mint NH 2¢ Misperfed Error Plate Block of Four - Stuart Katz

$ 26.35 $ 15.81

Scott 2263a 1988 20c Cable Car Imperforate Coil Error Mint Plate Strip 5 VF NH

$ 86.23 $ 51.73

1731, 13¢ Misperfed Error Right Margin Pair With Normal Mint NH - Stuart Katz

$ 26.35 $ 15.81

#R68 VAR. "FOREIGN EXCHANGE" WITH 1 - 1/2mm PRE-PRINTED PAPERFOLD ERROR BS3997

$ 28.6 $ 17.16

1181 - 5¢ 1964 - Battle of the Wilderness Misperfed Error (Collectible Stamp)

$ 8.56 $ 5.13

US Scott #2764b mint never hinged flower booklet black omitted error og f/v

$ 242 $ 145.19

1393 6¢ Eisenhower 2-way misperf MNH

$ 2.59 $ 1.55

#2259 13.2c Coal Car EFO Misperforated Strip of 5 MNH OG "Include New Mount"

$ 14.08 $ 8.44

920b, XF NH Reverse Printing of Flag Colors PSE Certifcate - Stuart Katz

$ 110 $ 66

649, Mint NH 2¢ VERY RARE Misperf Error Block of Four Stamps - Stuart Katz

$ 171.6 $ 102.96

U.S. #1332 var Mint NH w/Cert - 5c Space, Missing Red Flag

$ 220 $ 132

1694a, MNH Hard to Find Misperf Error Block of 20 Stamps - Stuart Katz

$ 131.12 $ 78.67

1633-82, MNH 13¢ RARE Miscut Error Full Sheet of 50 Stamps - Stuart Katz

$ 132 $ 79.2

2868a, Mint NH 29¢ Cranes RARE Misperf Error Block of Six -- Stuart Katz

$ 110 $ 66

2107, MNH 20¢ Remarkable Fold Over Error In Sheet - YIKES! - Stuart Katz

$ 110 $ 66

267, Mint H RARE Double Perf Error PL# Strip of 3 - Stuart Katz

$ 110 $ 66

US EFO Scott #2297 Flower Showing Registration mark!

$ 3.08 $ 1.84

1800a Error Green & Yellow Omitted VF-XF OG NH SCV. 0 (JH 4/3/2020)

$ 233.2 $ 139.91

917A, Reverse Printing of Flag Colors - Mint NH Name Block - Stuart Katz

$ 171.6 $ 102.96

377, Mint NH 4¢ Pre Printing Paper Fold Error Strip of Six Error - Stuart Katz

$ 171.6 $ 102.96

1943 Overrun Countries Sc 917b Yugoslavia double black impression EFO CV 0

$ 157.08 $ 94.24

C90 - Beautiful Bold Reverse Offset Error / EFO On Gum Error Mint NH

$ 52.79 $ 31.67

113 - 2c 2-Way Misperf Error / EFO "Pony Express" Series 1869

$ 40.47 $ 24.28

2513a Error Imperf Pair - 2512 P in Proofs VF-XF OG NH (JH 4/3/2020)

$ 435.6 $ 261.36

EFO C76 "GHOST PLATE NUMBER" FROM EXCESS TAGGING APPLICATION

$ 8.8 $ 5.28

901a, MNH 3¢ One Imperforate Between Pair in Full Sheet Error - Stuart Katz

$ 83.6 $ 50.16

PRC China Tien An Men block of 6 R4 MNH extra fiber on Pre-Printing Paper

$ 26.35 $ 15.81

#R54 VAR. "50¢ CONVEYANCE" W/ 2 PPF ERROR; SMALL TEAR AT BOTTOM RIGHT BP0090

$ 22 $ 13.2

#C76a ROSE RED (LITHO) OMITTED ERROR CV 0 BS7582

$ 418 $ 250.8

U.S. #2788aP Mint NH - 1993 29c Classic Books, Imperf Block

$ 308 $ 184.8

US Sc 1618C MNH. 1978 Flag Coil Paste-up pair with red Bureau of Engraving Tape

$ 110 $ 66

2428, MNH 25¢ Fold Over Error Creates Crazy Perforations Sheet - Stuart Katz

$ 308 $ 184.8

C127, Mint NH 45¢ Misperfed Error Block of Four Airmail Stamps - Stuart Katz

$ 83.6 $ 50.16

1866, MNH 37¢ Misperfed & Pre Printing Paper Fold Block Error - Stuart Katz

$ 259.6 $ 155.76

SCOTT#C88, 26C STAMP MOUNT RUSHMORE NATIONAL MEMORIAL MISPERF SHEET OF 50 NO GUM

$ 154 $ 92.4

EFO US Scott #2072 MINT NEVER HINGED VERTICAL ANGLE MISPERF. CHANGE OF DESIGN.

$ 9.63 $ 5.78

US Booklet cover miscut for BK121

$ 6.82 $ 4.09

DIE-CUTTING OMITTED, 2019 FLAG COIL PLATE NUMBER STRIP OF 5 #B1111, #5343a

$ 263.12 $ 157.87

MOMEN: US STAMPS #1434-1435 VAR. MAJOR COLOR ERROR MINT OG NH LOT #70808

$ 440 $ 264

1280c Frank Lloyd Wright Booklet Pane With 100% Plate Number

$ 30.75 $ 18.45

US SCOTT 1906, 17¢ ELECTRIC AUTO — MISPERFED PAIR

$ 1.74 $ 1.04

2015, 20¢ Scarce Two Way Misperfed Error Stamp Mint NH - Stuart Katz

$ 21.95 $ 13.17

1140, 4¢ Scarce Misperfed Error Mint with disturbed gum - Stuart Katz

$ 7.87 $ 4.72

1137, Mint NH 8¢ Misperf Shift Error Block of Four - Stuart Katz

$ 26.4 $ 15.83

684, Mint NH Heavily Over Inked Block of 14 Stamps - Stuart Katz

$ 35.15 $ 21.09

C76 Var, MNH 10¢ Red Patch Missing from 4 Stamps in Complete Sheet - Stuart Katz

$ 699.6 $ 419.76

P165 US Stamp RB32- RB35 1/8c / 5/8c Set Of 4 Blocks 4 MNHOG Great Coll

$ 20.1 $ 12.06

#1419 VAR. "UN 25TH ANNIVERSARY" BLK/4 W/ PRE-PRINT PAPER FOLD ERROR BP1326

$ 351.12 $ 210.67

15c John Jay Liberty Series Gray Blue Background Color Oddity EFO Stamps #1046

$ 2.63 $ 1.57

1894b, MNH 20¢ Flag Imperforate Between Error Strip of Ten CV 50 Stuart Katz

$ 875.6 $ 525.36

Scott # 1855s untagged error cover 1982

$ 4.4 $ 2.64

Scott # 1849a Untagged Error cover

$ 4.4 $ 2.64

Rare Error Strip of 5 Eisenhower 8 Cents Stamps Miss Perf in Center Scott #1402

$ 23.71 $ 14.22

EFO U411//U429(3) FOUR DIFF CUT SQUARES EACH WITH DIFF INKING ISSUES

$ 26.4 $ 15.83

J92 Var, Mint VF NH With Wide Spacing ERROR Pair EFO - Stuart Katz

$ 123.2 $ 73.92

1557a Red Star Omitted MAJOR ERROR - Mariner 10 -- Mint VF NH - Stuart Katz

$ 242 $ 145.19

MOMEN: US STAMPS #623 VAR. FOLD OVER PERF FREAK MINT OG NH LOT #72504

$ 132 $ 79.2

MOMEN: US STAMPS #529 VAR. BLOCK FOLD OVER MINT OG NH LOT #72530

$ 110 $ 66