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US EFO, ERROR Stamps: #3044 Kestrel Bird. PS3 X2 Plate varieties. #1111 BYCM MNH

$ 8.79 $ 5.27

US EFO, ERROR Stamps: #3477 Liberty. "911" perfin! PS5 #3333, PNC. MNH

$ 8.79 $ 5.27

US EFO, ERROR Stamps:#3617 Washington. PS5 #V36 Die cut shift & Bell diecuts MNH

$ 8.79 $ 5.27

1381 - 6c Baseball Doubling / Ghosting Error / EFO of Black Error Block of 4 MNH

$ 17.59 $ 10.55

C54 - Scarce 2Way Error / EFO Misperf "Missing Airmail" "Hot Air Ballooning" MNH

$ 24.63 $ 14.77

2841 - Scarce Color Shift Error / EFO "First Moon Landing 1969" 25th Anniv. MNH

$ 43.99 $ 26.39

2251 - Scarce Multiple Error / EFO Overinked & Tag Shift Blk4 Girl Scouts MNH

$ 202.39 $ 121.43

C76 Var, Red Shoulder Patch Missing on 2 Stamps In Full Pane - Stuart Katz

$ 347.6 $ 208.56

C90, Scarce Misperfed Error Airmail Stamp Shows Gutter MNH - Stuart Katz

$ 35.2 $ 21.12

C85, 11¢ Two Way Misperfed Error Airmail With Normal Mint NH - Stuart Katz

$ 35.2 $ 21.12

C63, Mint NH 15¢ Airmail Misperf Error Top Margin Block of Four - Stuart Katz

$ 66 $ 39.6

Nystamps US Stamp # 227 Mint OG 5 Double Transfer g7xx

$ 13.64 $ 8.18

C119, 36¢ Color Shifted Well Up Airmail Error Mint NH - Stuart Katz

$ 22 $ 13.2

C76 Var, Red Shoulder Patch Missing Error - Mint NH With Normal - Stuart Katz

$ 171.6 $ 102.96

C98, 40¢ Multiple Colors Shifted Error Airmail Stamp Mint NH - Stuart Katz

$ 14.91 $ 8.94

C25, 6¢ Over & Underinked Error Airmail Stamps Mint NH - Stuart Katz

$ 13.15 $ 7.89

1312 5 Cent Bill of Rights Misperf

$ 7.87 $ 4.72

US 1551 Christmas Currier & Ives 10¢ MNH mint plate block EFO Yellow Color Shift

$ 7.03 $ 4.21

Set of 4 EFOs MNH Mint NH EFO color shift, doubled image

$ 2.63 $ 1.57

2980 Great Color Shift Plate Block!

$ 28.6 $ 17.16

1615Cd MNH 8.4c Precancelation printing ERROR OKLAHOMA CITY

$ 1.75 $ 1.05

US ALBINO COVER, TYPE SCOTT# U93, MINT, ENTIRE

$ 0.13 $ 0.07

C76, MNH 10¢ MASSIVE Color Shift Error Moon Landing Stamp - Stuart Katz

$ 66 $ 39.6

1237, Mint NH 5¢ Large Perf Shift Error - The Sciences - Stuart Katz

$ 26.35 $ 15.81

NobleSpirit NO RESERVE Exciting DRAMATIC Mortgage MIS-PERF ERROR!

$ 11 $ 6.6

946 - Scarce Misperf Error / EFO "Joseph Pulitzer" Mint NH

$ 13.19 $ 7.91

1912-15, MNH Strip - Misperforated Error Shows Gutter at Left NO RESERVE!

$ 11.44 $ 6.86

1548 - Color Shift Error / EFO Makes "The Legend Of Sleepy Hollow" Underlined NH

$ 10.55 $ 6.33

1892-3 MNH Booklet Imperf Between

$ 22.88 $ 13.72

2063 - 20c Misperf Error / EFO "Change of Design" Mint NH

$ 7.91 $ 4.74

998 Confederate Veterans LH Misperf Pair

$ 4.61 $ 2.76

C98, Color Shift Philip Mazzei Plate Block of 12 40 Cent Airmail Postage Stamps

$ 396 $ 237.6

ST.LUCIA #J2 & BERMUDA #81, T IN CIRCLE. BEAUTIFUL RARE INTER-ISLAND COVER.

$ 35.15 $ 21.09

2085a, MNH 20¢ Misperf Error In Block of 30 Stamps - Stuart Katz

$ 26.4 $ 15.83

1299 MAJOR PERFORATION ERROR IN COIL PAIR, NICE ERROR STAMP!!

$ 2.1 $ 1.26

1356, 6¢ Large Green Color Shift Error Mint NH With Normal - Stuart Katz

$ 17.55 $ 10.53

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

$ 171.6 $ 102.96

US Scott #554 Mint-Hinged With Some Creasing as Well, OFFSET ON SELVAGE ERROR SK

$ 21.99 $ 13.19

2126a - 6c Scarce Misperf Error / EFO "Tricycle" Mint NH

$ 7.03 $ 4.21

C54 - Scarce 2Way Error / EFO Misperf "Missing Airmail" "Hot Air Ballooning" MNH

$ 24.63 $ 14.77

E19 - Scarce 20c Misperf Error / EFO Special Delivery "Post Office Truck" MNH

$ 19.35 $ 11.61

807a Rare Miscut Pl# 22171@ Right Booklet Pane W/ 3mm Spacing Mint NH

$ 52.79 $ 31.67

2841 - Scarce Color Shift Error / EFO "First Moon Landing 1969" 25th Anniv. MNH

$ 35.19 $ 21.11

5399-5400 - Scarce Color Shift Error / EFO "First Moon Landing" 50th Anniv. MNH

$ 11.43 $ 6.85

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

$ 110 $ 66

1455 - 8c Huge Color Shift Error Change of Design "Family Planning" Mint NH

$ 6.15 $ 3.69

C98a 40c Color Shift Error / EFO Perf 10.5 x 11.25 "Philip Mazzei" Mint NH

$ 15.83 $ 9.49

C76, MNH 10¢ MASSIVE Color Shift Error Moon Landing Stamp - Stuart Katz

$ 66 $ 39.6

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

$ 83.6 $ 50.16

C76 Var, Red Shoulder Patch Missing Error - Mint NH With Normal - Stuart Katz

$ 171.6 $ 102.96

C98, 40¢ Two Mazzei Amazing Color Shift ERRORS Mint NH - Stuart Katz

$ 52.75 $ 31.65

C70, MNH 8¢ Two Pre Printing Paper Folds in PB of 9 Airmail Stamps - Stuart Katz

$ 83.6 $ 50.16

C119, 36¢ Color Shifted Well Up Airmail Error Mint NH - Stuart Katz

$ 22 $ 13.2

C64, MNH 8¢ Misperfed Full Sheet of 100 Airmail Error Stamps - Stuart Katz

$ 171.6 $ 102.96

C67a, MNH 6¢ Scarce Tagged Error Sheet of 100 Stamps CV 0 - Stuart Katz

$ 242 $ 145.19

C76 Var, Red Shoulder Patch Missing on 2 Stamps In Full Pane - Stuart Katz

$ 347.6 $ 208.56

C32, Mint NH 5¢ Large Misperf Error Airmail Stamp! - Stuart Katz

$ 22 $ 13.2

C80, MNH 17¢ Reverse Printing Under Gum Error Sheet - Stuart Katz

$ 523.6 $ 314.16

C94a, MNH 21¢ Color Shift Sheet of 100 Airmail Error Stamps - Stuart Katz

$ 435.6 $ 261.36

C11, HUGE COLOR SHIFT MAJOR ERROR - 5¢ Beacon Mint NH - Stuart Katz

$ 523.6 $ 314.16

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

$ 74.8 $ 44.88

Cigarette Tax Stamp Test / Dummy "State of Blank" Strip of 6 Mint NH

$ 14.07 $ 8.44

20L56, Local Stamps Mint NH Block of 30 Stamps Extra Row of Perfs With PFC

$ 220 $ 132

1057/TD95 Misperf Error / EFO "Statue of Liberty" & Test Pair Group MNH "Read"

$ 14.95 $ 8.97

2916b BK225 RARE IMPERF ERROR Booklet of 10 PO Fresh Mint NH

$ 1100 $ 660

#1906 17c Electric Auto EFO Misperforated PNC5 #2 MNH OG VF

$ 19.36 $ 11.61

#3477 34c Statue of Liberty EFO Misperforated Diecut Strip of 5 MNH OG VF

$ 13.2 $ 7.91

4188 - Huge Misperf Error/EFO PNC5 #V11111 "Flag" Dead Center Mint NH

$ 61.59 $ 36.95

86, Unused 1¢ Misperfed Error RARE on an Early Stamp CV 00.00 - Stuart Katz

$ 171.6 $ 102.96

Nystamps US Stamp # 119 Mint OG LH 50 Rare Vignette Shift Error s5y

$ 66.88 $ 40.12

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

$ 110 $ 66

2721 - Color Shift Error / EFO Group "Elvis Presley" Mint NH

$ 11.43 $ 6.85

Scott 1789Pg 1979 15c John Paul Jones Imperforate Pair Mint VF NH Cat

$ 28.15 $ 16.89

2540Pi, .90 Eagle Black Engraved Omitted Imperforate Pair ERROR - Stuart Katz

$ 660 $ 396

1789, MNH 13¢ Pair With Vertical Gutter Between Variety W/Normal - Stuart Katz

$ 176 $ 105.6

Error 2609a imperf strip of 6 w/plate 4 Mint OG NH Extra Fine (09/21 TJ)

$ 39.6 $ 23.76

1278a 1c Jefferson miscut booklet pane wide right MNH

$ 1.75 $ 1.05

1614a MNH 7.7c Saxhorns strip of 7 complete set Bureau Precanceled NORWALK CA

$ 7.03 $ 4.21

US ALBINO COVER, MINT, ENTIRE

$ 0 $ 0

1281a 3c F Parkman precanceled sideways " SAINT PAUL MN " , block of 4.

$ 5.27 $ 3.16

(1090) Scott #2870, Recalled Legend Sheet, w/envelope, Free Shipping.

$ 46.2 $ 27.72

SCOTT #2870 MNH RECALLED LEGENDS OF THE WEST BILL PICKETT ERROR SHEET

$ 65.95 $ 39.57

SCOTT #2870 MINT NH RECALLED LEGENDS OF THE WEST BILL PICKETT ERROR SHEET.

$ 44.88 $ 26.92

EFO SHEET BUTTERFLY (1712-15) VERT LINE ON PLATE BLOCK SIDE

$ 17.6 $ 10.56

US MISCUT POSTAL CARD: SCOTT# UX12, MINT, ENTIRES

$ 1.76 $ 1.05

739 1934 Wisconsin Error EFO MNH plate block of 10 Crazy Perf fold over

$ 39.6 $ 23.76

1461 - 8c Color Shift Error / EFO Olympic "Jumping" Bobsledding Mint NH

$ 4.39 $ 2.63

US ERROR Stamps: #2279a Earth Space. Imperf & var. PS6 #1111 PNC MNH 5.+

$ 175.12 $ 105.07

Scott #1304C MISPERFED Coil Joint-Line Strip of 5 - MNH

$ 8.8 $ 5.28

nystamps US Errors,Freak,Oddities Stamp Mint OG NH Misperf Paid S17y1006

$ 1.98 $ 1.18

2249 - Huge Multiple Color Shift Error / EFO "Black Heritage" Series Mint NH

$ 13.19 $ 7.91

1511 Huge 2-Way Misperf Error / EFO "Zip Code" Mint NH

$ 7.03 $ 4.21

C76, Mint NH 10¢ HUGE Color Shift Error Plate Block - Fantastic! - Stuart Katz

$ 308 $ 184.8

US STAMP BOB STAMPED ENVELOPE ALBINO ERROR COVER COLLECTION LOT 11 COVERS

$ 7.48 $ 4.48

Nystamps U Mint NH US Postage Due stamp Rare sheet Face 0 Center shift error

$ 88 $ 52.8

Nystamps US Stamp # 720c Imperf Error Mint OG NH 00 s19xa

$ 67.76 $ 40.65

Error 2529a Imperforate Pair Printer's Waste Mint NH OG Very Fine LB

$ 25.52 $ 15.31

1529 - Black Litho. Color Shift Error / EFO Space "Skylab" Mint NH

$ 11.43 $ 6.85

US STAMP CHRISTMAS SEAL 1927 MH/OG BLK OF 4 PROOF STAMPS ERROR #6

$ 1.32 $ 0.79

nystamps US Errors,Freak,Oddities Stamp Mint OG H Offset S17y1038

$ 24.53 $ 14.72