Courtesy of the Paul Mauser Archive, we have a very cool opportunity to look at the documentation and paperwork behind a production pistol design, from beginning to commercial sales. This sort of documentation is rare for pre-WW1 German small arms in general, and the Mauser Model 1910 pistol is a very rare example of a complete set of archival papers surviving. So, what we can look at is the whole development process form behind the scenes at Mauser. Initial design drawings, blueprints, glass-plate photography, internal assembly instructions, costing, corporate-level final approval, marketing, and final print manuals. Thanks to Mauro Baudino for supplying these original documents for me to show you!
The Paul Mauser Archive is a wealth of information for researchers, and make sure to check out the recent book on Mauser coauthored by Mauro Baudino and Gerben van Vlimmeren: Paul Mauser: His Life, Company, and Handgun Development 1838-1914.