Antique Winchester rifles are far too in-depth to be adequately covered by the miserable 'Blue Book.'
First, your rifle was made in 1906. From your description, it appears to be of standard rifle configuration although there were many variations of special order sights, etc, possible on this model. It should have the standard crescent buttplate with relatively plain straight-grain wood.
.25/20 is actually the least desirable caliber in this model, with .44/40 holding the most value. Still, the most commonly encoutered 'brown' gun with a decent bore will still bring greater than $400 anywhere. If the gun has a high percentage of original blue remaining, it would be wise to get a hands-on appraisal as values can get into four digits pretty quickly.
The autonomic nervous system provides for involuntary muscle function - the work of breathing, digestion, and so forth. On some folks, that's a pure waste of ingenuity.