It is an 1893 or 1895 Mannlicher turn bolt action. The actions or barreled actions were sold to custom gunmakers in both Europe and the UK (and presumably elsewhere) before the 1914-1918 war. I don't know if Steyr sold complete rifles, but they probably did so. The actions require a special clip if they are to be used as a magazine rifle. Without the clip, you have only a single shot. The actions are very smooth in operation, almost as smooth as an old Krag, but it cannot be operated quickly because of the design & placement of the bolt handle. The magazine is very easy to load if you have the proper clip. Looks to me as if there is room enough under the scope to use the clip. When the magazine was empty, the clip dropped out of a slot in the bottom of the magazine, near the trigger guard.
There were some very high-end sporters (Rigby, Gibbs, etc.) built on this action, but I don't think this is one.
I think the 1895s were largely replaced as a complete sporting rifle from Steyr after the introduction of the Mannlicher-Schoenauer in 1903. Ken Waters wrote an article about them in the March 1991 Handloader, reprinted in the fat "Pet Loads" book. This is probably a very light weight rifle intended for alpine hunting or some such use.
I suspect that there is an error in listing the caliber. Dixon's book lists 2 variations of 6.5 x 48R cartridges,but both were straight-tapered cases intended for single shots. The chamber cast, in the plastic bag hung from the trigger guard, looks much like a 6.5 x 53R (called the .256 Mannlicher in the UK). All of the few such rifles I have seen (and the one in my gun safe) have been chambered for the 6.5 x 53R cartridge.
The Austrian barrels of that time had very deep grooves, .266 to .268, and won't give much accuracy with our .263 or .264 bullets.
