Matthews' "Firearms Identification", "volume II", copyright 1962, page 114, illustration No. 310, describes it simply as "7.65 mm D.W.M. Pistol". BTW, the pistol illustrated in FI vII is serial 4647. Kinda neat that the very pistol described and pictured in a book 49 years ago would wind up in my collection.
Photo comparison to the FN Browning 1910 Model.