Royal Mail Heritage: Mail By Bike
   Pentacycle, 1882
   Motorcycle and trailer, 1902
   Tricycle and basket, 1920
   Bicycle, 1949
   Motorcycle, 1965
   Quad bike, 2002
      without extra imprint
         17-digit No.: xxxxxx xxxx-xxxx-xxx

different imprints: 1st Class up to 100g / 1st Large up to 100g / Euro 20g World 10g / Worldwide up to 10g / Worldwide up to 20g / Worldwide up to 40g

         16-digit No.: xxxxxx xx-xxxxxx-xx

         16-digit No.: xxxxxx xx-xxxxxx-xx

different imprints: 1L / 1LG / A Letter / 1L Signed For / 1LG Signed For / SD1

      extra imprint: The Postal Museum