Ed, that is simply AWESOME - I just downloaded the spreadsheet. Thank you for compiling this!
May be old news but here is a link to info on the Schuler concern.I saw the "August Schuler" marked example in the list and I was going to inquire about that one. Lo and behold, I get a photo without even asking!
There are actually numerous early Model 2s with "Germany" markings in various locations. Interestingly, I've never observed "Germany" markings on any of the other three models. But it's possible that some may have escaped my notice.
See my Lignose thread for a number of those "Germany"-marked Model 2s and the location of the markings:
https://luger.gunboards.com/showthread.php?23435-Lignose-Research-Data-and-Observations