Hello all, I've recently become the custodian of a BWM, sole entitlement to a chap who served in the Royal Navy from 1909 to 1935. In my research about him I have found him in 1939 living in Littleton outside Winchester, adjacent to H.M.S Flowerdown. His occupation is given as C.S.W.S DSD9 Admiralty. I've found some information online about C.S.W.S and established it's the Admiralty Civilian Shore Wireless Service. I have found some reference to the DSD but not sure if I have the correct abbreviations there appears to be multiple choices and none with the 9 reference. Would anyone be able to shed more light on the C.S.W.S and the DSD9 bit? Regards Dan.