Right off, I don't remember exactly who Rudolph Berger's, Koethen/Cthen, Wallstrae 19, is related to Constanz Berger & Carl/Karl Ludwig Berger of Wittener Stahl.

http://de.wikipedia.org/wiki/Louis_Constanz_Berger

But I'd say that it was made of Wittener steel and is the basis for the Dreyse-Berger-Frst Pless-Teschner-Collath variant. Plenty of info here:

http://www.doublegunshop.com/forums/ubbt...true#Post316793

http://www.doublegunshop.com/forums/ubbt...true#Post294400

http://www.doublegunshop.com/forums/ubbt...true#Post265283

Yes, I'd like to see the contraption.

Kind Regards,

Raimey
rse