Double express shotgun, centerfire, external hammers, 8.6 mm caliberRibbed barrels. Checkered band, signed "G. Steinerenner. Friburg". Raise with a sheet and assembly for a bezel. Engraved rocker, lock and hammer. Adjustable trigger. Horn trigger guard. Reinforced break of plate of brass formerly. Stick with cheek in drowning partly squared. Barrel length: 65 cm - Overall length: 106 cmA .B.E. About 1860 / 1880 .