RAF Bomb Distributor "Mickey Mouse"

[Andymac53]

Hi - my father often referred to a "Mickey Mouse Box" in his nose compartment of Bostons IIIa. I believe this was a bomb distributor/interval timer that had two round dials that resembled Mickey Mouse's ears. I think it was located on the starboard side, towards the front so that it could be accessed while using the Mk XIV sighting head. Does anyone know of any reference materials for it? Some pictures, ideally.