Stamp hinge

Clockwise from top left, we see a hinge-mounted stamp, stamp about to be hinge-mounted, stamp damaged by a hinge, and loose stamp hinges
Multiple hinge remnants are visible on the back of this stamp.

In philately, stamp hinges, or mounts, are small, folded, transparent, rectangular pieces of paper coated with a mild gum. They are used by stamp collectors to affix postage stamps onto the pages of a stamp album.[1]

  1. ^ Mackay, James. Stamp Collecting: Philatelic Terms Illustrated. 4th edition. London: Stanley Gibbons, 2003, p.68. ISBN 0-85259-557-3