russp1,

Unfortunately, Wolf & Klar is no longer in business. There have been various attempts to locate their business records but, to my knowledge, they remain unavailable.

That M1905 certainly could have been a Ranger's gun. Perhaps you can find a picture of your wife's ancestor that shows him with it. You might contact the DPS in Austin and the Ranger Museum in Waco to see if there are any photos of the man.

Bob