A fella in Russia has it with a quite a few more interesting pieces. I don't know the value. But both have Berger locks as per the screws on the sides. I've inspected a F. Dreyse this week and both locks are cocked and unlocked at the same time. So I'd say both are based on the Dreyse design with Berger locks and made by Teschner-collath. One interesting stamp on the circular lockup of the Dreyse was the stamp "Rand Schloss OP" if I have the spelling correct. On most of the Dreyse examples I've seen cartridge info was stamped on the circular piece.

Kind Regards,

Raimey
rse