Early symbols of the Special Delivery Service had been the running messenger (who was evocative of winged Mercury), used on stamps from 1885 until 1895, and the messenger on bicycle in 1902. In 1922 the special delivery stamp featured a letter carrier with motorcycle, a mode of transportation that suggested speed, efficiency, and growing modernity of the mail. It was also the first design in this class of stamps to actually show a carrier delivering a letter to a customer.
The motorcycle on the 10-cent Motorcycle Delivery Issue is not a specific brand, but if a postmaster had a motorcycle at his disposal, it was probably either an Indian or Harley-Davidson. And, of course, his special delivery carriers were the cycle's intended users.
Six issues of the Motorcycle Delivery stamp were released with five different denominations in a twenty-two year period. The 1922 Issue had a ten-cent denomination, and so did the 1927 Issue, but the stamp had 11 x 10.5 perforations. The 1925 Issue had an additional five-cent fee for special delivery of parcel post mail, a total fee of fifteen cents. And between 1931 and 1944, the Post Office Department issued stamps in 13-, 15-, and 17-cent denominations.