20 March 2018 - Centenary of the Royal Air Force
The Centenary of the Founding of the Royal Air Force was marked by a set of 6 stamps, a miniature sheet, a retail booklet and a prestige stamp book.
The Machin definitive pane from the PSB contains 2x 2p, 3x 5p, and 2x £1.17 stamps. A retail booklet was issued at the same time containing a 4 x 1st class definitive stamps and 2 x RAF aircraft stamps.
This is a set of 3 Machin definitives coded M18L MPIL from the PSB and a single 1st class code MCIL on a Royal Air Force FDC with Kingston-upon-Thames postmark showing a biplane.