My 1918 DWM has an interesting machining variation on the frame rear, just below the rear toggle link. See picture.
Instead of being gently rounded, this gun has an abrupt edge in the machining just at the line where the indentation for the loop starts. I pointed this out to Ted Green who believes that this is the original cut and that the gun has not been modified.
Has anyone else seen such a variation?
http://boards.rennlist.com/upload/FrameRear1918DWM.jpg