I may be able to help,!!
Hi, I have allready paid a vast expense on air britain serials ,as i am a aviation archaeologist, I also have a metel detector that will go to 40 ft max,which ive just recieved , cant wait to use it,
any how , mail me the serial no, and i may have it , and i can tell you all i can find,
hope i can be of help,
kind regards
chris collins