This pistol is an all matching,including 2 magazines, 1912 Erfurt S/N 7119 and holster stamped with Hannover, I believe. My grandfather brought it back from WWI and it has recently come into my possession. I am going through his discharge papers and piecing together his experience as an ambulance driver in 1918 France. In comparing it with photos on this site I note a lack of unit markings on the frontstrap. Any useful opinions or explanations?