31 July 1971
RSME Open Day 1971
Stamps: 3ᵖ "John Keats" commemorative, issued 28 July 1971.
Special Handstamp: Royal School of Military Engineering Open Day, BFPS 1177, RE Grenade in the centre.
Gold RE badge: Whilst the overall cover design is the same the RE badge is gold and smaller. The type face is also different.
Stamps: 2½ᵖ Machin definitive, magenta.
Circular Date Stamp: Medway, 1 MAY 1972, Kent.