This is a Swiss Degen, a type of large dagger following on from the medieval baselard.
The hilt components are steel and yew, the pommel cap is secured with a peen and bronze decorative rivets.
The blade is 23.5"/59cm and the overall length is 28.5"/72cm, 2.25"/54mm wide and 3/16 4.8mm thick at the hilt. It weighs 1lbs9oz/712g.
The sheath is a double layer leather with integrated suspension straps and some decorative stamping and a bronze chape.