Robert,
The few Death Head lugers shown in books all have that marking on top of the chamber and all were 1917 or 1918 WWI luger guns...Not sure about this WWII piece...I would have held on to the Dutch luger...but maybe I am partial due to being Dutch-Indonesian...
I am having a brain fart at this moment...are you the same LF member that bought a very rare French Luger a couple of years ago for $ 450 at a flea market...?
Regards,
Pete...