I recently acquired a Browning Citori Sporter, with a serial number that places its manufacture at 1979. It appears little used, with the packing grease still found within the frame and bottom of the barrels. My question is the wood. The wood is original to the gun. However, it holds a very light colored, plain grain, satin finish. I do not think it has been re-done, due to the sharpness of the checkering. I thought that maybe the previous owner took down the top coat, removing the "gym floor" type finish, but again, it would seem that would impact the checkering.

Anyway, what I can I use other than linseed oil to maybe darken the wood? It is not blonde, but a light brown. Thank you in advance.