Used
A stamp or stationery item that has been canceled by a postal authority to prevent its reuse on mail. In general, a used stamp is any stamp with a cancel or a precanceled stamp without gum. See also Postally Used and Philatelic Cover.
Popularity: 1% [?]
Universal Postal Union
An international organization formed in Bern, Switzerland, in 1874, to regulate and standardize postal usage and to facilitate the movement of mail between member nations. Today, most nations belong to the UPU.
Popularity: 1% [?]
Ungummed
A stamp without gum. Ungummed stamps are either stamps issued without gum or an uncanceled gummed stamp that has had its gum soaked off. Many countries in tropical climates have issued stamps without gum.
Popularity: 1% [?]
Underprint
A fine printing underlying the design of a stamp, most often used to deter counterfeiting.
Popularity: 1% [?]
Type
A basic design of a stamp or a set. Catalogs use type numbers or letters to save space. Catalogs show a typical design of one type rather than every stamp with that design or a similar design.
Popularity: 1% [?]
Triptych
A se-tenant strip of three related stamps forming one overall design. See United States Scott 1629-31, the 1976 Spirit of 76 issue.
Popularity: 18% [?]
Transit mark
A postal marking applied by a post office between the originating and receiving post offices. It can be on the front or back of a cover, card or wrapper.
Popularity: 1% [?]
