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In 1899 and 1900 there were TWO makers of m/96 Swedish Mausers. Mauser Oberndorf and Carl Gustafs. Generally they are classified the same as far as value is concerned, but some people prefer one made by Mauser.
Condition is everything, and if you really want a better idea of the value, instead of everyone having to guess, you are going to have to post pictures.
The Swedes believed in utilizing old rifles to supply repair parts so stocks and other parts were replaced. Barrels were inspected and replaced regularly and a 1899 rifle could have had several barrel changes depending upon who and where it was used. Some barrel replacements after 1955 have threaded ends.
Also, a rifle that old should have inspection marks stamped on the underside of the wrist of the stock. These tell a lot of the story of the rifle. When a rifle went to a repair station or back to Carl Gustafs for a regular inspection it was stamped, and also stamped when any large repairs were done.
Barrel markings under the wood can also tell a story of the rifle. On a Carl Gustafs rifle, there are 13 different areas that have markings or numbers that should be present. Some are not visible without disassembly.
There could even be sight modifications and updates. The Swedes changed from the round nosed 156 grain m/94 bullet to the lighter 139 grain spitzer m/41 bullet and the sights on some rifles were changed while others had compensation plates attached to the stocks or decals added to the stock. Front sight patterns were changed, and rear sights modified when this was done.
There were even two patterns of stock disks, and an 1899 rifle originally had two screw disks denoting the Unit or Regimental numbers. This was later changed to a one hole disk denoting condition. However, these later disks only show the condition of the rifle at the LAST inspection, and many hundreds of rounds could have been fired since then. These disks are even available on e-bay so are not a 100% indicator of the rifle condition.
All of the above can have a bearing on the value of a m/96 Swedish Mauser rifle. Unfortunately, the information you have given is lacking in many of these areas when making an honest evaluation of your rifle. Pictures, above anything are essential when asking about the value.
Given that, I would say that a good example should be in the $200 to $350 range but depending on condition the value might be another $50 upwards but could go as low as $100 for one that is shootable, but well travelled.
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