looks like the copy of an early Teschner double gun, surprising from france
https://auctions.springer-vienna.com/de/...;currentpos=223

S/S shotgun L. Francois - Paris, 12/65,79 cm barrels of brushed fine rose Damascus, concave rib, inscribed "L. Francois à Paris", bright rounded action engraved with bold foliate scroll, sliding / tilting action type Collath, rotating lever beneath the fore-end, on the right rotating safety on the fence, double triggers, carved horn-finger rest, walnut stock, sloping cheekpiece, steel buttplate 36 cm, sling swivels, year of manufacture about 1890, action and wood to metal fit slightly loose, stock with old repairs, condition III.

... and no, its much older