German 4" Navy Luger, caliber 9 mm Luger. A "double date" 1917/1920. Made by DWM in 1917 as marked on chamber and right frame. Crown M proofs on left chamber along with a "Circle S" marking indicating refurbishment by Simson. Appears to have been re-built (again) after WW II by East Germany
GERMAN HELMET USED BY USTASE