That is an Erfurt tool and would match your Erfurt Luger if one of the acceptance marks on the Luger has the C/G.
Erfurt tools are always “unblued/ blank” and have always a 3 lobe crown while DWM tools are "blued" and have mostly a 4 lobe crown. Erfurt and DWM tools have a different shape.
I add a pic to show the differences...
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