Raimey,
Sorry for running a tad late on this, way too busy again.
Anyway, the gun in your pictures does look like a variation of Brenneke's Selbstpanner-Sicherheits-Drilling doesn’t it?
Do you have any more pictures? Do you know who made it?
Ger,
You’re a little off on your notion that Wilhelm Brenneke did not design internal action mechanism. For example please refer to patentschrifts 94620 and 95046. The Brenneke drilling above features a four point safety mechanism designed by Wilhelm Brenneke as the safest firearm on the market at the time … other than those that weren’t loaded. Mr. Brenneke is known to most as a munitions developer starting with his 8X72R and his well-known slug cartridge designs of 1898. He personally was not a gun maker but instead contracted others to make firearms per his specifications. Who made his combination guns is still a bit of a mystery with some suspecting any number of the Merkel family but we do know that he had his bolt rifles, utilizing Mauser actions, made by E. Schmidt & Habermann (ESHA) such as my 7X64 Model B bearing his name …
Regards,
Mark