The cachet usually appears on the left side of the envelope. Stamp hinges are thin rectangular pieces of paper which are used to hold stamps in an album. One side of each hinge is coated with a special adhesive that becomes sticky when it is slightly moistened. Hinges may be purchased from stamp dealers or hobby stores. Hinges come in two varieties, flat and pre-folded.
Coil stamps are stamps made for use in vending or affixing machines and are sold in rolls.
The other sides of the stamps are cut straight. A joint issue occurs when two countries each issue a stamp or stamps on the same date to commemorate the same subject. This happens frequently when the person or historic event honored has a special meaning for both countries. Franklin had been the first Postmaster General of both Canada and the United States. Both stamps were designed by the same person and looked nearly identical.