 The final years of the Canal Zone saw few stamps issued—those that were issued were mainly for new first-class postal rates (the first-class rates paralleled those of the United States) The last stamp (fifteen cents) of the Zone was issued on October 25, 1978, and depicted one of the towing locomotives and a ship in a lock.Thereafter Panama took over the administration of postal service and, after a brief transition period, Canal Zone stamps became invalid.In 1975 three stamps originally issued in 1928—1929, and one issued in 1946, were reprinted on the rotary press as coil stamps.