https://www.marambat-malafosse.com/en/lo...sy?search=&

"Extraodrinaire shotgun with system and barrel by Isaac Samuel armurier in Paris. Calibre 16. Damascus barrel of 750 mm long octagonal then round. Signature "....Samuel patent of invention without gas loss with safety stop" in gothic letters. A lever of underguard located at the front of the trigger guard induces the arming of the hammer, the rotation of the cylinder and the advance of the barrel when using its terminal ring one makes it swivel forwards. A tilting part is positioned at the air gap and ensures the locking and plating towards the rear of the cylinder, while allowing the barrel to pass through. A side trap door uncovers the mechanism, in position of opening the cylinder leaves its housing by swivelling on the right while remaining integral with the carcass by the intermediary of its articulated axis. Collective extractor in the form of a star of extraction and rotation of the removable cylinder by hand. English stock. Sheet metal butt plate. Functional mechanism. Set having turned to grey tobacco. A very rare piece, probably made in a few copies. Worthy of a hunting curiosity cabinet."