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These symbols represent the proof house that performed the testing.

The initial bylaws passed by the London Gunmakers Company charter of 1637 marked the first introduction of proof tests in England, but didn't specify an official standard of testing.

German Drillings and Vierlings A drilling with side by side shotgun barrels and a rifle barrel underneath with a side lock action.

A note of caution for those who are not familiar with a set-trigger, also called hair trigger.

This takes a lot of time because the barrels must cool off completely between shots.

Welcome to the new GGCA Forum! Welcome to the new GGCA Forum! Regulation is done by heating up the front end of the barrel assembly until the solder starts flowing, then moving the rifle barrel position in relationship to the second or third barrel.

Close Gun Identification By Dietrich Apel It is not as easy to identify a German made gun as identifying a gun made in the USA, and the following articles explain why.

Suhl proofhouse 1950-1992 Mark Valid Type of proof 1950-1992 First black powder proof for smoothbored barrels 1950-1992 First black powder proof for rifled barrels 1950-1992 Final proof 1950-1992 Inspection mark 1950-1992 Repair proof 1950-1992 Choke-bored barrel 1950-1992 Nitro proof 965 1950-1992 Date mark, in this case September 1965.

This is a typical 16 gauge of the period between 1912 and 1939.

-1945 Zella-Mehlis proof house mark 25 1939? In GGCA Journal 31 is a beautiful pin fire side-by-side shotgun with two names, one on the barrels and another on the backaction side locks.

The bolt handle is usually converted to a Mannlicher-style spoon handle.

Barrel rebluing on multi barrel guns must be done by the rust method.