Do y'all know those crystals were valued at £10.00 each?
As a Corporal at Dishforth c1959, at the start of each shift I had to sign for a whole cupboard full of hundreds of the damn things. This was the ARSF 'Crystal Bank!
Each pre-flight, we had a 'Crystal Fit' that was dependent on where the a/c, Hastings & Beverley's, were going to.
A nightmare it was checking all of the crystals in and out and trying to keep a record of which a/c they were all in, and which wireless mech had left one in his pocket.