Bieniecki Int'l, Inc The Largest and Oldest Firm in North America Specializing In Polish Philatelic Material
Groszy Overprints Site dedicated to the groszy overprints of 1950. It utilizes the exhibit material of Polonus member George Zelwinder to identify and illustrate the different overprints used during the currency devaluation. See George's exhibit in the "Exhibits" section of the Polonus website.
Polonica Stamps Commemorating Poland Issued by Other Countries
PZF - Internet Philatelic Club PZF affiliate with internet as the virtual meeting place for a global membership. Focus on promotion of Polish philately in the Polish language. In addition to publishing articles on a regular basis, this site included digitized versions of Polish philatelic publications, such as Przeglad Filatelistyczny.
Rossica Rossica Society is a world-wide society devoted to all aspects of Russian philately, from the pre-stamp days of Imperial Russia to current post-Soviet philately. The purpose of the Society is to unite all philatelist throughout the world with an interest in Russian philately.
Stamp Domain Site devoted to many areas of stamp collecting including multiple links to reference sites. This link takes you directly to the section pertaining to Poland. Click "Home" at top of this page to explore the other countries covered by this reference website.
Stamp Encyclopedia of Poland An extremely comprehensive listing of all the areas of Polish philately including regular issues, local issues, P.O.W issues and Labels. Virtually all issues items are described this comprehensive vast wealth of information. Text is in English
stamps-pl.com Internet auction site of Polish phiatelic material. Four to five auctions per year. Archive is excellent as reference material.