John,
Incredible work you did !! Great photos & explanations......I do not have much knowledge on those but find it quite interesting to look at those small details & differences.....
Gerben mentionned the Simson.I then got curious & did some photos of the GESICHERT on a Simson blank chamber.......
Compared to a Late War 1918 dated Erfurt, thought it would look similar......but they are different.....
And both are different than the #717 KH ``Early`` S Code......
MARK <img border="0" title="" alt="[Wink]" src="wink.gif" />