WW2 Style RAF "Acme" Thunderer Escape Whistle in both Brass and Nickel finishes.
These are exactly as used in WW2, made by the original wartime supplier to the RAF, made with all the AM markings on both sides of the whistle.
There is an AM stamp, Crown stamp, and RAF Stores number 23/230 on both sides.
Make no mistake, these are the real deal, identical to the escape whistles the RAF and USAAF pilots attached to their flight jackets during WW2.
Remade by the original contractor complete with all the WW2 markings.