13/09/17 - Royal Mail Heritage: Mail by Air set
This set of 6 Royal Mail by Air stamps was issued on 13 September 2017 produced from Stampex Machine B001 (type RM2)
First UK aerial mail and Windsor Castle 1911,
Military Mail flight 1919,
International airmail 1933,
Domestic airmail 1934,
Flying boat airmail 1937,
Database service 1980s.
Choice of Collectors Strip of 6 x 1st, or Collectors Set of 36 values in each design.