Garfield,
I am not sure you sent me the right e-mail address...can you try again in a PM...? Sent me some Paul Bunyon web-site stuff...(?)
In the mean time, please take a look at page 41 in C. Kenyon's book, Luger : The Multi-National Pistol.
Pictured is a nice Imperial era 1906 DWM commercial with lots of those "swirly" machining marks on the flat section of the right "ear"...
(I do not think this is an example of "photographic distortion"...)
Regards,
Pete... <img src="graemlins/yltype.gif" border="0" alt="[typing]" />