FT22 Machin 50th Anniv Post and Go 6x1st set Autumn Stampex inscription

2017 marks the 50th anniversary of the issue of new Queen Elizabeth II definitives featuring Arnold Machin's iconic bas-relief sculpture which replaced the Wilding definitives. Arnold Machin's 1967 portrait of Queen Elizabeth II (sometimes referred to as the Machin head) has been reproduced over 200 billion times.  

A new commemorative set of Post and Go Faststamps is issued in six colours, approximately matching the original ½d orange-brown, 1d olive, 3d violet, 4d deep sepia, 7d bright emerald, and 10d drab issued in 1967-8.

This is a set of 6 x 1st class from machine B001 or A012 at Stampex