Shop

EFO 1432 TWO DRAMATIC GREY INK COLOR SHIFTS (WITH NORMAL FOR COMPARISON)

$ 48.4 $ 29.04

EFO 1078 MISPERF CREATES DESIGN CHANGE -- "WILDLIFE CONSERVATION" MISSING BOTTOM

$ 26.4 $ 15.83

EFO 1485 ANGLED PERF SHIFT NO VA.UES ON BOT STAMPS- "JEFFERS' HEADACHE" - BLK4

$ 52.8 $ 31.67

EFO REVENUE R7c PRE-PRINTING PAPERFOLD HORIZONTAL THRU GEORGE'S NOSE!

$ 35.2 $ 21.12

Stamped Envelope USA Error Invert & Location

$ 8.8 $ 5.28

R34c 10 cent Contracts with double perforations.

$ 17.55 $ 10.53

#1305EJ IMPERF LINE PAIR-DRY GUM BM2070

$ 184.8 $ 110.88

US SCOTT #1631b STRIP/3 Imperf Error! "SPIRIT of 76", PF Certified, garyposner!

$ 726 $ 435.6

2088, DOUGLAS FAIRBANKS - RARE MISPERFED ERROR - WOW

$ 31.64 $ 18.98

US SCOTT #U617a Ultramarine Omitted RARE (DFP 3/2/20)

$ 440 $ 264

1991 FDC ,DISTRICT OF COLUMBIA, CANCELLATION ERRORS

$ 439.99 $ 263.99

804, MNH 1¢ Washington Misperfed ERROR Sheet of 100 Stamps - Stuart Katz

$ 286 $ 171.6

US Sc# 1591 Var *MINT OG NH { MISPERF ERROR "USE ZIP CODE INSIDE" } BLOCK OF 10

$ 57.2 $ 34.32

WASHINGTON 2 CENT INK SMEAR 1918 COVER OPC OWEN PUBLISHING PA TO COLORADO

$ 13.2 $ 7.91

1500, 6¢ Electronics Color Shift ERROR With Normal Mint NH WoW - Stuart Katz

$ 57.2 $ 34.32

EFO 1394 STRONG GHOST TAGGING IN THIS PLATE BLOCK OF FOUR

$ 22 $ 13.2

1910, Color Shift ERROR Sheet of 50 18¢ Red Cross Stamps Mint NH - Stuart Katz

$ 259.6 $ 155.76

US #4806 Inverted Jenny Sheet of Six w/ Excess Blue Ink Freak Error

$ 12.8 $ 7.68

1753 13 Cent French Alliance Color Variety

$ 21.95 $ 13.17

#1757 VAR 13c 1978 CAPIEX ISSUE PLATE BLOCK MAJOR COLOR SHIFT ERROR BU9454

$ 154 $ 92.4

2073, Mint NH 20¢ Misperfed Error Carter Woodson - Stuart Katz

$ 21.95 $ 13.17

1447 8 Cent Peace Corps Nice Color Shift.

$ 13.15 $ 7.89

#2280 25c Yosemite Flag Pair EFO Flag Inking Error MNH OG VF Block Tagging

$ 17.6 $ 10.56

#1618b 13c Liberty Bell Misperforated Strip of 5 w/Joint Line Pair MNH OG VF

$ 15.84 $ 9.5

1939 US 3c Jefferson Scott# 842 ERROR (HORIZONTAL PERFS) USED

$ 11 $ 6.6

US SCOTT #1488a ORANGE Color Omitted, SCV 0.00, So Cool from garyposner!

$ 176 $ 105.6

947 Postage Stamp Centenary Ink Smear ERROR MNH 3 c Sheet of 50 1947

$ 7.04 $ 4.22

INVERTED IMPRINT ON FLAG FOREVER STAMPS - FULL SHEET OF 10 - SCOTT #CVP108 ERROR

$ 17.59 $ 10.55

US ERROR Stamps: #2913a Flag Porch. Imperf & miscut PS7 #11111 PNC MNH 0.++

$ 351.12 $ 210.67

Scott #730 Chicago Century of Progress Sheet

$ 6.15 $ 3.69

US Stamp Scott# 1856c Sinclair Lewis Imperf. Pair 1985 Block of 8

$ 25.34 $ 15.2

Scott # 2609b...NH...29c Flag ..Imperf Between Pair..Mint OG NH...Cat 75.00

$ 20.19 $ 12.11

1928 Beacon Air Post Low-flying Plane Blue Vignette Design Shift Stamp MNH! #C11

$ 17.59 $ 10.55

Scott # 1203 & 1204 D. HAMMERSKOLD-Plate Blocks-MINT-NH-OG-VF

$ 1.75 $ 1.05

#75L1 & #75L5 1844 Hale & Co, Local Assortment Mint & Used

$ 212.52 $ 127.51

1729 Christmas 1977 Washington at Valley Forge Error EFO NH Too Green Color

$ 8.8 $ 5.28

1932 Washington SC#U436 U93 PURPLE 2 CENT DOUBLE IMPRESSION ON BACK ERROR

$ 17.52 $ 10.51

US SCOTT #5312-5315a b, NH JOHN LENNON Sheet/16, Die Cutting Omitted, garyposner

$ 1320 $ 792

US - 1954 - 8 Cents Dark Violet Blue & Carmine with Color Shift # 1041 Mint F-VF

$ 8.78 $ 5.26

US #810var 5¢ James Monroe Complete sheet of 100 -full double paper varieties

$ 475.2 $ 285.12

US, 1943 Christmas Seals, Printer Mark S, Black Offset Register, WX113, MNH

$ 21.63 $ 12.98

2478b, MNH 3¢ With Double Impression MAJOR ERROR - Stuart Katz

$ 158.4 $ 95.04

1483a, Mint NH Color Shift EFO Error Sheet of 50 Stamps - Stuart Katz

$ 171.6 $ 102.96

1800, 15¢ Two Different Large Color Shift ERRORS Mint NH WoW - Stuart Katz

$ 35.2 $ 21.12

917c 5c Yugoslavia partial reverse MNH (see closeup)

$ 8.58 $ 5.14

US 3054a 32¢ 1997 Rose Missing Die Cut Pair Miscut Design Change EFO

$ 37.4 $ 22.44

US #811 MNH 6c John Quincy Adams, EFO: misperf

$ 1.58 $ 0.95

Stamp Pair 1949 DC-4 Skymaster Airmail #C39a PERFORATION ERROR MNH/OG

$ 5.72 $ 3.43

Sc # 2115C ~ 22 cent Flag Over Capitol Dome Issue (dg15)

$ 1.31 $ 0.78

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

$ 7.04 $ 4.22

2256a, Mint VF NH 8.4¢ Wheel Chair Imperforate Pair Error -- Stuart Katz

$ 242 $ 145.19

P860 US stamps Scott ? 8c Extra Red Green Line Errors UNH Nice Coll

$ 4.26 $ 2.56

1430a Double Impression MAJOR ERROR - 8¢ Wildlife - Mint NH - Stuart Katz

$ 1760 $ 1056

1771a Error Imperf Pair VF-XF OG NH SCV. 0 w/ 2 certs (JH 4/4)

$ 464.64 $ 278.78

US. 1771. 15c. Martin Luther King. Portrait Double Transfer. VARIETY. MNH. 1979

$ 2.18 $ 1.3

807, MNH 3¢ Under Inked Error In Complete Sheet of 100 - Stuart Katz

$ 171.6 $ 102.96

US MNH Error Stamp & Normal Stamp Haym Salomom Scott #1561 (Perf Shift)

$ 17.59 $ 10.55

G6/75 US Stamp # 1305e 15c Coil Perf not Through Pair MNHOG Nice Freak Pair Coll

$ 6.15 $ 3.69

#C81 VAR. AVG OG NH Right Margin Horz Pair Misaligned Perfs (JH 6/5/21)GP

$ 83.6 $ 50.16

D0175: US #3981a Mint Strip of 5, ERROR

$ 87.99 $ 52.79

US 1981 20c Pumper Coil Pair - Misperforation Error Scott 1908

$ 7.92 $ 4.75

2441ac, PINK COLOR OMITTED COMPLETE PANE MAJOR ERROR Cat ,250.00+

$ 514.79 $ 308.87

Scott 556 Variety Mint Pair (M. Washington) NH Pre-Printing Paperfold EFO E0

$ 220 $ 132

US #1894c (1981) 20c -MNH-EFO: {99% - Dk Blue Omitted} sheet 100 - Scarce/Rare

$ 99000 $ 59400

EFO 1472 PERF SHIFT CHANGE OF DESIGN BLOCK OF FOUR

$ 39.6 $ 23.76

EFO 2114 MISPERFED PLATE BLK OF FOUR PERFS CUT THRU TOP OF OLD GLORY

$ 19.8 $ 11.88

1519a 10c crossed flags coil strip of 4 IMPERF ERROR 1973

$ 28.16 $ 16.89

1972 Family Planning 8c Stamp #1455 MNH MISPERFORATION ERROR

$ 6.11 $ 3.66

1986 Stamp Pair Cardiologist Paul Dudley White MD 3c #2170 MNH MISPRINTING ERROR

$ 6.11 $ 3.66

US, 1932 Christmas Seal Block, JUMBO Margin, Perf 12 1/2 x 12 3/4, MNH

$ 12.83 $ 7.7

O3/47 US Stamps Christmas Seal 1949 Red Color Shift Error MNHOG Nice Error Coll

$ 2.5 $ 1.5

#2142a Vertical Pair Imperforate Horizontally Error Mint-VF-OG-NH (2/9/21 GP)

$ 211.2 $ 126.71

EFO 1448 BEACH SHIFTED TO RIGHT! COVERS SOME MARGINAL DESCRIPTIVE TEXT

$ 17.6 $ 10.56

1593 .11 Printing Press Mispef Plate Block Of 25 MNH

$ 175.12 $ 105.07

3069a, MNH 32¢ Georgia O'Keefe Complete Imperforate Pane ERROR - Stuart Katz

$ 572 $ 343.2

3412 SPACE ACHIEVEMENT UNIQUE DOUBLE HOLOGRAM ERROR STAMP NH EX. JACQUES SCHIFF

$ 5279.99 $ 3167.99

1281 Nice Two Way Margin Misperf!

$ 12.27 $ 7.36

ATOMIC BOMB ENDS WWII - 1995 U.S. POSTAGE "STAMP" (TYPE 4) - MINT CONDITION

$ 2.59 $ 1.55

R1/55 US stamps Scott ? 6c Per Shift Error UNH Nice Coll

$ 6.02 $ 3.61

#2130B Oil Wagon Imperf Error Stamp #3   MNH OG VF

$ 131.95 $ 79.17

#2280e "FLAG OVER YOSEMITE" PAIR BLACK TREES ERROR BP2560B

$ 107.8 $ 64.67

#1816B IMPERF COIL PAIR BM2530

$ 92.4 $ 55.44

2198-2201b Missing Black 2198,2201. Complete Booklet Of Two Panes. Cat. 0

$ 69.52 $ 41.71

EFO REVENUE R144 LARGE BOTTOM MARGIN CAPTURES PART INSCRIPTION AND PLATE NUMBER

$ 57.2 $ 34.32

United States, 1930 Christmas Seal FREAK, Gray Ooze, Printer E, WX55, MNH

$ 9.31 $ 5.59

3835 Complete Misperforated ERROR Sheet of 20 - 37¢ Dr. Seuss - Stuart Katz

$ 330 $ 198

1610a, Mint VF NH Brown Engraved Color Omitted Error W/Normal -- Stuart Katz

$ 131.95 $ 79.17

1618C Misperf Error / EFO Strip of 3 "Flag" Mint NH

$ 7.64 $ 4.58

4133a (41c) American Flag Die-cut Omitted Error Pair CV 1,250.00

$ 373.95 $ 224.37

874 John J. Audubon, Scientist. 10 MNH 1¢ plate blocks. Famous American. 1940.

$ 6.6 $ 3.95

1734a - 13c Indian Head Penny Error FULL SHEET of 150 - Imperf Vertically

$ 17160 $ 10296

Scott 424 Variety Mint B6 (Washington) H OG Foldover/Printed on Back EFO E00

$ 682 $ 409.2

1509 Sheet Cross Flags Missing Ornament Top Of Right Pole Position 44

$ 351.12 $ 210.67

2915Ah / Flag over Porch / Strip of 6 Imperf (Die Cutting Omitted) Error / MNH

$ 32.07 $ 19.24

Cinderella S&H Green Stamp Test / Dummy "Sample Only" Strip of 6 Mint NH

$ 6.15 $ 3.69

USA EFO, ERROR Stamps: # 1055, T. Jefferson Misperf & miscut Strip of 5 ! MNH

$ 15.79 $ 9.47

USA EFO, ERROR Stamps: # 1906, Electric Auto Misperf & miscut Strip of 6 ! MNH 1

$ 19.75 $ 11.85

USA EFO, ERROR Stamps: # 1617, Justice Misperf & miscut Strip of 6 ! MNH

$ 22.39 $ 13.43

1610, MNH Flame HUGE Color Shift Error Zip Block WoW - Stuart Katz

$ 132 $ 79.2

US Misperforated 1949a booklet stamp, "Two-nosed Sheep"

$ 4.62 $ 2.77