Mad Magazine included perforated, gummed stamps in a few issues.

From 1933-1948, mandate services included airmail stamps and, as an innovation, air letter cards.

In 1911 the objects of the society were extended to include local stamps and railway stamps.

The term also includes stamps of the political predecessors of a country.

Other common types of forgeries include added stamps to a cover and forged postmarks.

This includes napkins, paper plates and cups, packaging or stamps.

Many entries (Dag Hammarskjold, for example) include stamps from several countries.

Communications includes postal services and stamps, telegraph, radio, television and other methods.

You will find a nice philatetic collection in Apia which includes stamps.

All major catalogues include Pakistani stamps in them.