http://www.germanguns.com/upload/showthread.php?1946-Christoph-Funk-Suhl-unusual-configuration
Can view only if you are a member.

Don't recall for sure, but we have viewed the intertwined H&S prior:

http://www.littlegun.be/arme%20belge/artisans%20identifies%20h/a%20halska%20v%20and%20cie%20gb.htm

V. Halska & Cie

Multiple tube type efforts in Wilhelm Kelber in 1931. Proofed in final state and experienced Express proof.



Cheers,

Raimey
rse