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Tyler's book, like his regular Focus on Forgeries feature that appears every other week in Linn's, compares the genuine stamp side-by-side with the forgery.
Tyler, Linn's Focus on Forgeries: A Guide to Forgeries of Common Stamps,Ohio, 1993, p. 44. ^ Fernand Serrane, The Serrane Guide: Stamp Forgeries of the World to 1926, Pennsylvania, [1926] 1998, p. 28.
Tyler): see: Private die match proprietary stamps. Érték: (Hung.) value. Ervenyes: (Hung.) overprint for "Valid" on obsolete stamps of Hungary. Erweiterer aufdruck: (Ger.) overprint. Erythräa: (Ger.) Eritrea.
See also: Catalog, Stamp, Cover, Local, Postal history
 
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