Royal Mail is marking the 50th anniversary of the current design on its stamps with a new issue.
The so-called Machin Definitive stamp, with its image of the Queen, has been reproduced in more than 130 colours since 1967 and reprinted an estimated 220 billion times.
It is considered to be one of the most reproduced images in the world, featuring a profile of the Queen by sculptor Arnold Machin.
One of the new stamps showing work by Arnold Machin. (Royal Mail/PA)
Born in Stoke-on-Trent, he had a long association with Wedgwood potteries and also designed the profile of the Queen that appeared on coins from 1968 where to buy stamps 1984.
Before 1967, an image of the Queen taken by society photographer Dorothy Wilding was used on stamps.
Dominic Newton, Arnold Machin
CreatedSunday, 23 July 2017