In philately, the term cover pertains to the outside of an envelope or package with an address, typically with postage stamps that have been cancelled and is a term generally used among stamp and post
1856 cover posted in New York City with three 1-cent stamps affixed
AAT cover commemorating the opening of a post office in 1959
A "Sieger cover", one of the hundreds of covers which traveled to the Moon during the 1971 Apollo 15 postal covers incident
A cancellation is a postal marking applied on a postage stamp or postal stationery to deface the stamp and to prevent its reuse. Cancellations come in a huge variety of designs, shapes, sizes, and col
Cover (philately)
…In philately, the term cover pertains to the outside of an envelope or package with an address, typically with postage stamps that have been cancelled and is a term generally used among stamp and postal history collectors. The term does not include the contents of the letter or package, although they…
Numeral 70 identifying Boyle, diamond bars for Ireland
Hand stamp of the type used to cancel postage stamps
1929 machine cancellation used to cancel 1d stamp on first flight cover from Nassau to Miami
An 1851 U.S. stamp with a pen cancellation