Thanks Alvin,
I don't quite understand - what exactly is a 'Weimar Alphabet'? Are you saying the commercial lugers used the alphabetic characters as part of their serial number? I was thinking that only the military models would be numbered with the alphabetic characters in the serial number. That's kinda why I didn't understand why a C/N proofed model would have alphabetic characters in the serial number.
Yeah, I know I'm kind of thick. Here's an image of the back of the bolt. Barry
http://forum.lugerforum.com/lfupload/bolt1.jpg