Luger year by serial?

[DonVoigt]

Originally Posted by Roadster 02

See posting "My first Imperial Luger-1918 DMW page 10 That's where I got it from. Must be called Spandau mark.

Perhaps you are referring to the Imperial Eagle, the final proof marking on military lugers? DWM pistols were inspected by representatives from Spandau ; Erfurt inspectors had their own slightly different proof eagle.

It is the marking nearest the barrel on the right side of the chamber and also present on other pressure bearing parts.
Early DWM military lugers had the proofing on the left side

The pictures below show a DWM pistol and a 1911 Erturt; you can see the Erfurt eagle better on the barrel in this shot, and on the right side.

There is more info on these markings in the stickies.