The Portland Stamp Company's Artist Series is an ongoing collaboration with invited designers, artists, and writers who create original work for an unusual form: the poster stamp. The poster stamps are printed on lickable, gummed paper and pinhole perforated by hand on their vintage machines.
Commemorative poster stamps are artifacts from another time. These miniature bits of advertising were popular in Europe at the turn of the century. Their appeal, utility, and popularity quickly grew, becoming ubiquitous in the United States in the 1920s.