I have a question about a marking on a model 1912 Steyr-Hahn parts gun. The frame was made in Vienna in 1915. The serial number has a g suffix. "7HR. 14" is stamped on the frame above the right grip panel. Does anybody know what this means? I guessed it might mean 7th Hussars, so I tried to look up information about that unit. All I could find is that they were from the town of Papa, Hungary. Does anybody know where I can find a history of whatever unit 7HR 14 represents?