Luger with no proof marks

[gunbugs]

If you look closely at the "7" in the serial numbers, it appears the lower and sideplate are struck with the same stamp. The upper and barrel appear to be numbered with a different "7". The sideplate and lower have a thicker bottom leg on the "7". I think this gun was "built up" a long time ago. Also, the alignment on the serial number on the upper is pretty sloppy, even for a wartime DWM.