While there are numerous types of perforated stamps, with anywhere from seven to 16 1/2 perforations in the space of two centimeters, there are really only three types of imperforate U.S. stamps. The first are those issued before 1857, when the first three-cent stamps bearing the profile of George Washington were printed by Toppan & Carpenter of Philadelphia and perforated using a rotary perforating machine manufactured by Bemrose & Co. of Derby, England. The second type of imperforates are errors, or stamps that were intended to be perforated but somehow managed to slip through the machinery unscathed.

A third class of imperforate stamps encompasses those issued between 1907 and 1927 on imperforate coils, which were designed for, and sold to, private vending companies such as Brinkerhoff, Farwell, Schermack (which became Mailometer), and U.S. Automatic Vending. The machines made by these companies perforated the stamps for customers as they were dispensed. In some cases, completely imperforate stamps can be found from these rolls, but many have circular or “hyphen-hole” perforations between each stamp, with no perforations on the outside edges. U.S. Automatic Vending was known for its notched stamps, in which the corners of stamps were cut off to make them easier to tear.


Best of the Web (“Hall of Fame”)

The Stamp Collecting Round-up

The Stamp Collecting Round-up

Don Schilling's long-running, in-depth blog on stamp collecting and postal operations. Schilling stays up on all th… [read review or visit site]

National Postal Museum

National Postal Museum

If you're into postal history or collectibles, check out the Smithsonian's National Postal Museum. This extensive s… [read review or visit site]

Post Office in Paradise

Post Office in Paradise

Post Office in Paradise showcases Hawaiian postal history from the years before Hawaii became a part of the United … [read review or visit site]

Private Die Proprietary Stamps

Private Die Proprietary Stamps

Bob Hohertz's impressive database of U.S. Private Die Proprietary stamps from the Civil War and Spanish American Wa… [read review or visit site]

Alphabetilately

Alphabetilately

First shown in 2008 to celebrate the Smithsonian National Postal Museum's 15th anniversary, Alphabetilately is esse… [read review or visit site]



Clubs & Associations

Other Great Reference Sites

Most watched eBay auctions    

Momen: Us Stamps #2 Imperf Washington 10c $ Lot #3167Us Imperf Sc # 1 1847 5c Used Cat $440Scott #2 Washington Imperf On 1849 Folded Lttr. Kanawha C H, Va., Great ContentMomen: Us Stamps #315 Imperf Mint Og H Xf $300 Lot #3694Three Cent Imperf Scott 11 Used Xf Washington Star Of David CancelU.s. #611 Mint Nh Sheet Of 400 - 2c Harding, Imperf#3205 (2), #3307 (3), #3392, #3535 Mnh 1 Stamp Imperf Looney Tune SheetsUsa : Beautiful Lot Of Imperf Forever Sheetlets From Press Sheets. Face $242.52.U.s. #17 Used - 12c Black, Imperf ($280)U.s. #12 Used - 5c Red Brown, Imperf ($700)Five Cent Imperf Scott 12 Used Xf Jefferson Scv.$700Scott #1 Franklin Imperf On Folded Letter Orange Red N Y Grid Cancel To BostonU.s. 1852 Imperf. 1c Blue Washington Type Iv Hand Cancelled Hinged Orig. Scott 9Lf45544 Usa 1934 Perf/imperf Landscapes Nature Fine Lot Mnh Cv 48€St. Thomas Porto Rico 1869 - Clara Rothe - 1r Blue ImperfUs Lot Of 22 Postal History Stamps Copies Repros Fakes 1857 - 1861 Imperfs Etc !Scott#409, 2c Imperf Coil Stp4, Brinkerhoff, Type I. Nh.$us Sc#368 M/nh/vf-xf, Imperf Line Pair, Cv. $60Noblespirit No Reserve Excellent Us 3¢ Washington Imperf Cancel & Variety StudyUs Lot Of 31 Postal History Stamps Us 1847 - 56 Copies Repros Fakes Imperfs NiceSt. Thomas Porto Rico 1869 - Clara Rothe - 2r Violet ImperfUs Stamp Washington #10a Type Ii Used Pen Cancel Imperf 18516 Different Error Stamps Misperf Pair No Denomination, Imperf, Color Shift Etc.Us Washington & Franklin Imperf Stamp Set Us Washington & Franklin Imperf Stamp Set Schermack PerfsScott 534b, 2c Washington, Imperf,type Vii, Offset Press, Used, Rare$us Sc#371 M/nh/xf, Imperf Line Pair, Cv. $72.50Us Revenue Stamps #r48c-r49c,r54b (part Perf),r60a (imperf),r60c,r64c,r65c1851 Scotts #14 (?) Washington Ten Cent Postage Stamp Imperf UsedU.s. #314, 320, 320b Mint Nh - 1c - 2c Imperfs ($85)Scott#408 & 409 Imperf Pairs, Schermack Type Iii. F/vf.#10 Us 3 Cent Orange Brown Imperf Washington-used-n/gum-fineMr Fancy Cancel Scott 2265a Mnh 21c Imperf Pair EfoMnh/mh Us 1909 Stamp Set W/ Imperfs 367 - 368 & 370 - 373 Four Of The Stamps In Us Stamp:#r92a $5 Probate Of Will 1862-91 First Issue Revenue Imperf Stamp $800Usa Stamp #344 2c Carmine Imperf Franklin 1908 Stripe Of 3 Unused/ngUsa Stamp #408 1c Washington Imperf 1912 Blk Of 4 Mnh/ogUnited States Sc# 11 Csa Confederate Unused Imperf Block Of 8 1863-1864 IssueEarly Us 20 Stamps Copies Some Repros Fakes Imperfs Some Real Fancy Cancels !etc1851 3c Washington Imperf #11a Apple Green Postmark And Cancel, Southington Ct!Mr Fancy Cancel Scott 1597 Mnh 15c Block 4 Imperf EfoUs ~ #531 + #532 1919-1920 1c-2c Imperf Issues - Mint Mh/ogMr Fancy Cancel Scott 230 Mint No Gum G 1c Imperf Miscut Pair EfoU S Local - The American Letter Mail Co Stamp Imperf 1844 ? Blue Eagle Stamp Us Errors Freaks 2518a Imperf Pair MnhSmall Collection Of Mnh/mh Us Washington & Franklin Stamps Imperf & Coils Mr Fancy Cancel Scott 2609a Mnh 29c Strip 4 Imperf EfoLf45549 Usa 1934 Imperf Mt. Rainier Landscape Sheet Mnh Cv 60€Noblespirit No Reserve Excellent Us No. 17 Used Imperf W/ Blue Cancel = $265 CvLf45546 Usa 1933 Imperf Chicago Fine Sheets Mnh Cv 100€Us Hudson-fulton, Imperf Sc # 373 1909 2c Mint Nh Cat $375Mnh Us National Park Imperf Stamp Set 756 - 765Mr Fancy Cancel Scott 2130b Mnh 10.1c Imperf Pair EfoMr Fancy Cancel Scott 1596a Mnh 13c Imperf Pair EfoU.s. 3c Franklin Imperf X P10 MintU.s. #2281a Mint Nh - 1988 25c Honeybee, Imperf Pair ($45)Sc# 611(strip Of 4) 2c, Black. Imperf. Mint. Fabulous Fake. W/cert.Us Lot Of 24 Postal History Stamps Copies Repros Fakes 1857 - 1866 Imperfs Etc !U.s. #2463a Mint Nh - 1995 20c Cog Railway, Imperf Pair ($75)$us Sc#373 M/nh/vf-xf, Imperf Stamp, Cv. $40