Robert Schrader of Göttingen(founded firm 1885) had a patent on September 10, 1902 for drillings with rifled tubes of lengths 40 - 50cm and scattergun tubes near 72cm(I'd like to see the patent to see the actual range). Robert Schrader had several patents and his drillings were complex with odd features similar to Brenneke's. Baron von Münchhausen was a client of Robert Schrader's and was a fan of the 40-50cm rifled tube on a drilling. Schrader more than likely sourced the craftsmen of Suhl.
In Florence, AL today I saw a rough condition Robert Schrader Göttingen hammer drilling with what I guess to be a 40cm rifled tube that had it's own menancing muzzle beneath the scattergun tubes and the short rifled tube had "DRP" in script on the tube so it may have been as early as 1902. The calibre was 9.3X82R and was stamped on the extractor side much like those seen on Teschner - Collath examples.
Kind Regards,
Raimey
rse
