The specialty of essays, proofs and specimen stamps is represented in the WPL by 19 books, 40 pamphlets and 41 additional specialized catalogs in English, Swedish, French, German, and Spanish.
Examples of some of our holdings:
Bendon, UPU Specimen Stamps
Giles, Essays of the India Provisionals of 1925
Mata, Catalogo de Timbres Fiscales de Costa Rica [Spanish]
The Royal Collection (of King George VI of Great Britain)
Said, Catalogue of Malta Stamps
Samuel, Specimen Stamps of the Crown Colonies 1857-1948
Svenson, Stildrag Hos Vara Frankotechen [Swedish]
Turner, Essays and Proofs of the United States Internal Revenue Stamps
USPS, United States Postal Card Catalog 1985
In addition, the following journal is hardbound and available for reference:
Essay-Proof Journal
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