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”)

1847USA

1847USA

Bob Allen's beautiful and well organized catalog of US stamps from 1847 to 1970 is a fantastic resource for all US … [read review or visit site]

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]

R. A. Siegel Auction Galleries

R. A. Siegel Auction Galleries

This auction house site offers an extensive online database of US stamp information. Includes PDF catalogs of past … [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

Most watched eBay auctions    

Us Revenue Lot - 186 Revenue Stamps W/some Dup Noted Inc Imperf, Part Perf, EtcUs 315 Vf Og Lh 5 Cent Lincoln Imperf, Weiss Cert.Scott 14 10 Cent Green Imperf Cds Cancel Type IiU.s. #371 Mint Vf Plate Block - 1909 2c Seward Imperf ($225)Us 10c Imperf, 1847 Sc 2 Used Cat Value $1000Su002 Usa 1851/57 Sc#12 " Jefferson" Imperf On Piece Used Cv:$825U.s. #320 Mint Nh Block - 2c Carmine, Imperf ($195)Imperf 1c Franklin On Cover Ny To Morristown OhioUs 5c Imperf, 1847 Sc 1 Used Cat Value $425Scott #533 Mint Washington Imperf Cv $90.00Su001 Usa 1851/57 Sc#17 Used " Washington" Imperf Cv:$300U.s. #531 Choice Nh Plate Block - 1c Green, Imperf Offset ($190)Imperf 1c Franklin Strip Of 3 Ny Cancel To Oakland Female Institute Noristown PaUs Scott #1906b Electric Auto: Imperf Error Coil Pair. Mnh.Us Stamp:#344h 2c Carmine 1908-09 Imperf Mnh/og Stamp Line Stripe Of 3Scott #534, 534a, 535-536 Mint Washington Imperfs Cv $77.50Us Scott #2112a "d" Eagle: Imperf Error Coil Pair. Mnh.U.s. #371 Choice Mint Superb Nh Pair - 1909 2c Seward Imperf ($72)Us 2c Huston Imperf, 1906 Sc 320 H Cat Value $270Us Stamp:#482v 2c Carmine 1916-17 Imperf Mnh/og Stamp PasteupUs Scott #2915ah Flag/porch: Imperf Error Coil Pair S/a. Mnh.Us 1935 Mnh Issued No Gum 7c National Park Imperf Plate Block Sc# 762Us Stamp Sc 534b 2c Carmine Mint Nh Og Imperf Washington Avg Cat$1000(9) Used Schermack & Imperf Early 1900's Usa Stamps U.s. #346-47 Mint Nh - 4c - 5c Imperfs, Dlw ($89)Us 1935 Mnh Issued No Gum 6c National Park Imperf Plate Block Sc# 761Scott #531 Mint Nh Washington ImperfUs Stamp:#12 5c Red Brown 1851-57 Imperf Used Stamp U.s. #483-84 Choice Mint Nh Pairs - 3c Violet, Imperfs ($83)Us Stamp:#7 1c Blue Franklin 1851-57 Imperf Used StampUs 314 Vf Og Nh 1 Cent Franklin ImperfUs Stamp:#15 10c Green Type Iii 1857-61 Imperf. Used Stamp $160U.s. #1804 Var Mint Nh - 1980 Banneker, Imperf PairError - #1402 8c Eisenhower....imperf Pair, Vlh -start@99cUs Scott #2518a "f" Flower: Imperf Error Coil Pair. Mnh.Us Scott #2913a Flag/porch: Imperf Error Coil Pair W/a. Mnh.Us Scott #2115f Flag Capitol: Imperf Error Coil Strip Of 4. Mnh.Us 2c Imperf, 1910 Sc 384 Vlh Cat Value $131996 Sc 3112c Major Imperf Error With Certificate Cv $50U.s. #754-65 Vf Blocks - 1935 Imperf Parks ($66)Ds Old Us Stamp Scott #314 1 Cent Franklin Imperf Used Cv$18Us Scott #2609a Flag White House: Imperf Error Coil Strip Of 5. Mnh.Us Scott #2136a Breadwagon: Imperf Error Coil Pair. Mnh.Us Classic Imperf Stamp 3c Washington 11 Usa Stamp #345 3c Violet Imperf Washington 1908 UnusedMnh / Mh Us Washington & Franklin Imperf Stamps 481 €Us Scott #2523b Flag Rushmore: Imperf & Miscut Error Coil Pair. Mnh.Us Scott #1618cd Flag: Imperf & Mis-cut Coil Pair, Error. Mnh.Us Stamps - #482 - Used - 1 Cent Washington Imperf - Guide Line Block - VfMh Us Washington & Franklin Imperf Stamp 383 Plate Number Mr Fancy Cancel 368 Blk Of 4 Two Cent Imperf Very Fine+ Mint Light Hinged Cv$62+U.s. #368, 371 Mint - 1909 2c Imperfs ($128)Imperf Sheet Of Twenty Muscle Cars Stamps With Out Die CutsScott#2607c, 23c Usa Presorted Coil Imperf Pair. Xf & Nh.Us Scott #4640a Four Flags: Imperf Stamp Strip Of 4, Error, Mnh.Us Stamp:#535 3c Violet 1918-20 Imperf Offset Mnh/og Stamp Pl# Blk Of 6 $125Us Stamp (l110) Scott# 756-765, Mint Nh, Imperf Parks Set, Vf CenteringMh Us Regular Definitive Series 1c Franklin Imperf Stamp 314 Us Scott #2280c Flag Yosemite: Imperf & Miscut Error Coil Pair. Mnh.Scott #575-577 Mint Nh Imperf Set