Which edition of the Brophy do you use? In the 2nd edition I own he lists the BHM cartouche as "Name: ? - Time Period: 1908-1915 - Armory/Arsenal or Factory: Springfield Armory". He lists H.M. Brooks - but with a "HMB"-cartouche from 1902-1920. Anybody seen such one yet?
@Rick: I don't have the rifle by hand now, will take ~2 weeks until I can look for a S. But I will.
Regards,
Georg