Honest Jon,
Here are a couple of photos from my 1913/1920 Erfurt/Police (Correction/Edit : My 1920 DWM Police) that might help...
The magazine safety is mostly intact but was "clipped" in the area behind the trigger to render it disabled. The sear safety is still in place atop the sear bar...
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />