FWIW, "Bohler-Blitz Stahl" is a description of the "superior" material used in making the barrel(s) - a telling selling point - and NOT a firearm manufacturer or brand name.
The buttstock scratching & "CAS" on the forend iron, of the OP's gun, are amateur owner's markings - added sometime in the gun's lifetime, after it left Austria.
The 'thingie" on the OP's gun's barrel should be the front sling swivel.
IMHO, it's a well-crafted Alpine Stalking Rifle, marked or not.
I like the back-action lock & Roebuck engraving(s).
I would WAG it as being pre-1900, since it's a hammergun.
Last edited by PetahW; December 19, 2011 at 08:07 PM.