Interesting system of combinated gun

[MARAT]

Hello everybody!
I 've just arrived from Moscow, where I saw interesting combinated gun.
can somebody explain me what system is it?
and describe proofmarks.
If I right understand the rifle barrel is 8x 65 mm ???WP_20141209_20_43_59_Pro.jpgWP_20141209_20_44_07_Pro.jpgWP_20141209_20_44_17_Pro.jpgWP_20141209_20_44_30_Pro.jpgWP_20141209_20_44_47_Pro.jpg

[MARAT]

WP_20141209_20_54_04_Pro.jpgWP_20141209_20_47_28_Pro.jpgWP_20141209_20_47_39_Pro.jpgWP_20141209_20_49_27_Pro.jpgextra pictures

[MARAT]

I "ve never seen such system before....

[mike ford]

Marat,
I have an idea, but not sure enough to say any thing yet, I would rather wait for Axel or his friend "Shotgun Charlie"to weigh in. The gun, however was proofed in Suhl in April 1934. As you stated, it is chambered for the 8x65R and since the bore dia. is shown as 7.8 mm,it would be the .318"bullet version. It was proofed with an "express proof" which is an increased level of proof. The initials in the circle ,between the case length and date, may id the maker, but just as likely, the barrel maker. BTW you didn't show the forearm, do you also have it?
Mike

[chapmen]

Thats the "B" model of Schraders/ Göttingen so called "Schildzapfenverschluss" - dont ask me to translate "Schildzapfenverschluss".........

[MARAT]

WP_20141209_20_55_19_Pro.jpgTo my great disappointment, the owner didn't have forearm
And I ask everybody , who can help - send ,PLEASE, pictures of original forend!!!!

[MARAT]

Chapmen!
can you show us the model "A" ???

[chapmen]

This is what Konrad Eilers shows in his book from 1910.
These are Drillings, but breech system is same.
Top is signed in the text as model "B",
underneath is the model "A" (new form).

[Axel E]

Robert Schrader, Prinzenstrasse 8, Göttingen, was a very inventive gunsmith. He patented many gun actions, from lockwork, various breech actions, bullets to detachable peep sights. In DWJ 1/1995 "Martin Müller" (= Prof. Martin Moog) wrote a long article about Schrader and his inventions. Dick Hummel published some on Schrader in "Waidmannsheil # 49". Many of Schrader's patent guns were made for him by the former Dreyse, later Rheinmetall factory in Soemmerda.
This gun was protected by three of Schrader's patents:
The lockwork is to his DRPatent # 100914 of 1899. It protects a spring cocking lock, similar in function to Beesley's self opener used by Purdey. A two-limbed V-spring constantly pushes the hammer back to full cock, while a weaker top prong tries to push it forward. To make it ready for firing, a camlifts the lower limb out of contact with the hammer, allowing the upper prong to push the hammer forward to fire the gun. As the cam is released again, the lower limb of the spring pushes the hammer back to full cock. On Schrader's design this cam is worked by the trigger-like underlever. This underlever serves two purposes. When pushed forward the gun is opened. in the middle position the gun is locked up and safe, as the lower limb of the mainspring holds the hammer back at full cock. Pulled back up against the pistol grip it readies the gun for firing.Pushed back to the middle position sets the gun on safe.
The breech action was patented by DRPs # 137824 (model A), 1903, protecting the basic breech action, and # 165257, 1905, for the detachable sideplate to ease takedown (model B). There is no conventional hinge pin in this action. Instead, there are trunnions, "Schildzapfen" in German, on the barrel, just like the trunnions on a cannon. Hence the name "Schildzapfenverschluss" = trunnion breech action.

[MARAT]

Chapmen! thank you!