At Bristol Aerospace Museum.
A very unusual artefact.
The caption reads – “These keys were used to set the WE 177C freefall atomic bomb. A simple type of key, similar to those used to open slot machines of the period, was used to set many of the atomic bombs carried by British V-bombers.”
A very important link to a bit of cold war history. Also in the museum is an item relating to the modification of Polaris known as Chevaline.