Kevan;
Top of the morning to you sir, I trust this finds you well.
I'm going to assume that you're the Kevan I sorta know from a couple other forums - and if you're not then that's cool too and hello.
Anyway I've been lucky enough to have a few books on my shelves on rifles and Mausers in particular.
If you can find this one for a reasonable price, it's about the most exhaustive research and information I've found on the subject.
http://www.amazon.com/Mauser-Bolt-R..._UL160_SR113,160_&refRID=09VT1FRNDH1W0E9REK26
Anyway sir, hopefully that's helpful to you or someone else out there this morning with a Mauser or three in their safe who is wondering from whence it actually came.
All the best to you this BC long weekend sir.
Dwayne