Looking for Info on 1914 DWM Unit Markings

[Hugh]

Glenn,


I believe that if you will look closer, you will find that the barrel marking is "Bo31".Bo is the mark put on barrels made with steel supplied by the Austrian steel making firm of Bohler. They supplied steel to DWM shortly before WWI, some of which was used to make barrels. The "31" indicates the surface hardness of the metal.