9 September 2015 - LONG TO REIGN OVER US miniature sheet with 1st class gravure Machin in Amethyst Purple and four other stamps printed in intaglio/recess which have the Machin head and:
1st class William Wyon's City Medal of Queen Victoria
1st class Doroth Wilding portrait of Queen Elizabeth II
£1.52 The Badge of the House of Windsor, featuring the Round Tower of Windsor Castle
£1.52 The Queen's Personal Flag, created for use in Commonwealth Countries in 1960.
Issued to mark the occasion on which Her Majesty Queen Elizabeth II will become the longest serving monarch of this country.
The definitive Machin stamp is coded 015R under the chin, and (REI)GM behind the neck.
SG number probably MS3747 - we have renumbered from 3744.