United States mint & used stamps include: definitive and commemorative, airmail, officials, possessions - Canal Zones, Hawaii and Danish West Indies and other back of the book stamps plus cut squares, booklets & booklet panes, errors, freaks, & oddities (EFO).
World Wide mint & used stamps include: British Commonwealth countries, Great Britain, Canada and Provinces, Australia and Provinces, Netherlands, Russia, Switzerland, Ireland, Iceland as well as other countries.
United States and World Wide Covers include: Stampless Folded Letters/Covers, Postal History, Airmail, Registered, Censored, Advertising, First Day Covers, First Flight and Airmail, Postal Stationary and V-Mail from World War II plus Post Cards (mainly early 20th century Santa Claus, Hawaii, Patriotic, New York City and the surrounding area) among others.