Mike, I bet I can help, since I co-wrote the book Simson Lugers
Here is what I'd like to know (and see in pictures)
(picture of 889a) Serial number to include suffix if there is one
All matching?
Does the bottom of the stock lug have a E6 E6 or E33 E33 on it (as if looking UP the magazine well from underneath)
what are the markings on the right; i.e. eagle 6 (E6) E6 E6 proof eagle? or
Does it have a Sear safety or other police or unit markings on the front or rear grip strap?
Please post info here, but feel free to email direct
weimar_lugers@verizon.net
889a was probably made around 1933 and Simson grips are known to be "fatter" than other manufacturers.
Ed