WW2 Aircraft Torpedoes artefact help

Dear All,

Usually hang around in ‘Historic’ but wonder if you chaps, being munitions experts might be able to help-

picked this up from ebay recently – i know it was made as a workers present for an employee of the Whitehead Torpedo works in Bournemouth c.1945 but have no idea what Mark it might be – anyone up on torpedoes who might be able to tell me what Mark it is, and it it was air-dropped.

Thanks in advance

TT