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- Q247300 subject Q7400722.
- Q247300 subject Q8810008.
- Q247300 abstract "In philatelic terminology, perforation gauge has two meanings: As a term for classification. The "perforation gauge" of a stamp specifies the number of perforation holes that appear in a two-centimeter span along its edge. The finest gauge ever used is 18 on stamps of the Malay States in the early 1950s, and the coarsest is 2, seen on the 1891 stamps of Bhopal. Modern stamp perforations tend to range from 11 to 14. Many stamps are produced with "compound perforations" i. e., the vertical and horizontal perforations will be of different gauges. Many U. S. stamps have been perforated 10½ x 11. As the name for a philatelic tool used to measure perforations. Invented in 1866 by Jacques Legrand, the typical "perf gauge" (sometimes called an odontometer) is a metal or plastic tile on which perforations of gauges ranging from 7 and 7½ to 16 and 16½ are pictured (the pictures sometimes appear at the edges of the tile). The philatelist places each of these depictions beside a stamp until one is found that exactly matches the stamp’s perforations. Such a gauge is an indispensable tool for identifying stamps that present identical images but have been issued with perforations of several different sizes. An extreme example is the U. S. Washington-Franklin Issues, some of which are found with perforations of gauges 8½, 10, 11, 12, and 12½.↑ 1.0 1.1 ↑ ↑".
- Q247300 thumbnail Perforations_US1940_issues-2c.jpg?width=300.
- Q247300 wikiPageWikiLink Q466034.
- Q247300 wikiPageWikiLink Q731790.
- Q247300 wikiPageWikiLink Q7400722.
- Q247300 wikiPageWikiLink Q7971629.
- Q247300 wikiPageWikiLink Q849856.
- Q247300 wikiPageWikiLink Q8810008.
- Q247300 comment "In philatelic terminology, perforation gauge has two meanings: As a term for classification. The "perforation gauge" of a stamp specifies the number of perforation holes that appear in a two-centimeter span along its edge. The finest gauge ever used is 18 on stamps of the Malay States in the early 1950s, and the coarsest is 2, seen on the 1891 stamps of Bhopal. Modern stamp perforations tend to range from 11 to 14. Many stamps are produced with "compound perforations" i.".
- Q247300 label "Perforation gauge".
- Q247300 depiction Perforations_US1940_issues-2c.jpg.