Methinks your seat ID may be wrong. I don't think that BOAC was a Jaguar mate. He was a LIGHTNING MATE.
The seat in the pic is deffo a Type 9 as used in early jags- without seeing the seat pan - there is a possiblilty that it could be an early Harrier seat (which also used a Type 9 (Mk2) seat but different rocket pack and other mods. - later seats had the headbox /main chute container mod on the jag.
The lightning had a Type 4 Mk2BSB(C) seat in it which is totally different in configeration and design.
I have both types in my personal collection.
