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Stamp paper watermarks also show various designs, letters, numbers and pictorial elements. The process of bringing out the stamp watermark is fairly simple. Sometimes a watermark in stamp paper can be seen just by looking at the unprinted back side of a stamp. More often, the collector must use a few basic items to get a good look at the watermark.
The Stamp Collectors' Guide to Paper Used for Postage Stamps: illustrated with actual stamps or paper. Philadelphia: Andrew Huska, 1938 32p. Repeta, Louis E. Watermarks In Postage Stamp Paper: a comprehensive look at a key stamp element. Reprinted in 1999 from The American Philatelist (February 1987). 27p.
Stamped paper is an often-foolscap piece of paper which bears an imprinted revenue stamp. [ 1 ] [ 2 ] Stamped papers are not a form of postal stationery as although they may contain writing, they are not designed to be used to convey a message.
Invert error: Part of the stamp is printed upside-down. Inverted overprint: The overprint on the stamp is printed upside-down. Color error: Stamp is printed in the wrong color(s). Paper error: Stamp is printed on the wrong type of paper which, e.g., may have a different watermark or color than intended.
The U.S. Post office began using a double-line watermark bearing the initials USPS in 1895, when the Bureau of Engraving and Printing introduced it into the previously unwatermarked Bureau Triangles stamp issues. The same double-line watermark paper used then was used on the various issues leading up to and used in the production of the 1908 ...
True watermark. A true watermark is a recognizable image or pattern in paper that appears lighter or darker than surrounding paper when viewed with a light from behind the paper, due to paper density variations. A watermark is made by impressing a water coated metal stamp or dandy roll onto the paper during manufacturing.
In 1895 counterfeits of the 2¢ value were discovered, which prompted the BEP to begin printing stamps on watermarked paper for the first time in U.S. postal history. The watermarks imbedded the logo U S P S into the paper in double-lined letters.
An invert may be characterized as an "inverted center" or "inverted frame" when the underlying paper is watermarked or otherwise carries a basic orientation. It is possible for a single-color stamp to be inverted relative to watermark, but this is called an "inverted watermark" rather than an "inverted stamp".