A very good May 1940 dated copy of the Air ministry Air Publication AP 1275 Volume 1 Instrument Manual.
Whilst an invaluable reference on all manner of Aircraft Instruments, perhaps the most interesting for collectors will be the last two sections which cover The D and E Oxygen Masks (with a July 42 addition of the G Mask) and the MkV range of Flying Spectacles and Mk1V range of Flying Goggles.
A very heavy publication it includes amendments from May 1940 to May 1943. All sections are present and as far as I can see complete.
Overall condition is very good.
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