Group of three keys, at the center:

A “Bathtub” key as used during WWII by the RAF (Royal Air Force) and other Commonwealth Air Forces,  Ref. N. 10 A/7741, type F.

At the left: key marked “Key and Plug Assembly No. 9,

Cat. No. Z-A  0937”.

Inside contains a bakelite key, WT 8 AMP No. 2 MK II.

The straps were used to hold the key to the operator´s thigh.

At the right: a J5A Key and Switch, used with the No. 48 Set. Maker unknown.