© 2018 Darrell Drury - Royal Engineers First Day Covers
Date: 20 November 1972.
Title: The Sappers and Tanks in the First World War.
Type: First Day Issue - Commemorative Cover.
Stamps: 3ᵖ "Silver Wedding" commemorative, issued 20 November 1972.
Cachet: Carried around the R.A.C. centre driving circuit at Bovington in Centurion Tank, Armoured vehicle R.R. 02 ZR 14 Weight 51.4 Tons. Spr/Driver P.Coats at the Controls.
Special Handstamp: Corps of R.E. Inventors and Pioneers of Military Tanks, outline of an early tank,
See: Wiki Tanks in World War - https://en.wikipedia.org/wiki/Tanks_in_World_War_I