In reply to John Burns:
The RGS is holding a 1953 Everest right now at it's premises in London. It's mainly photographs (good quality) and there is a lot about oxygen on Everest from the early expeditions (Mallory and Irvine) up to to the '53 one. There is an oxygen set on display, but IIRC is from '53
The exibition is well worth visiting, but I thinik it is only on for a few more days.
Suggest you contact the RGS