The Ankh-Morpork Five Dollar Triangle

Five Dollar Brass Bridge Blue

Triangular in shape with an Empire Blue base tint giving way to Octorine hints.  Central design of the famous Brass Bridge over the river Ankh on which can be seen a wizard, watchman, and Assassin.  There is also a small boy but he does not count.
  Dimensions:  48 mm x 25 mm
  Released:  July 2004
  Withdrawn:  July 2006
Rarity:  490
   Individual stamp:  SHS-RW0008-Ab; SHS-AM0008-Aw

Sport:  Inverted head

The patrician's head is inverted.
This stamp is a error, rather than a deliberate sport

One day whilst Sue and I were visiting Bernard and Isobel, Colin Edwards one of the design team came in a bit concerned because there was an error on the $5 blue. Apperently on one of the stamps the patrician's head had been inverted as a check. It wasn't picked up and Colin forgot to put it back.
So one in fifty, as there are fifty $5 to a sheet.

Rarity: 10
SHS-AM0008-Bw

Five Dollar Waterbridge Purple

Shades of purple on white.  Features an early picture of the Watrebridge with thatched houses.
  Dimensions: 51 mm x 28 mm
  Released:  July 2006
  Withdrawn: 
Rarity: 500
SHS-RW0038-Aw