Most likely a Winchester 92 manufactured in 1909My wife's great grandfather gave her a 25-20 hex barrel in pretty good condition, serial number I 519469 I believe that it is a saddle gun.
Trying to find the year it was born and possible worth maybe
Good call.Agree with Model 92
Condition is so important in the value of old guns like that that it could be junk to treasure. Have someone competent look at it.