Casey- that mark is the "burning Bomb" and IS the mark for US military arms. Sounds like you have a Model 1917. Link for you: Collecting and Shooting the United States Rifle, Caliber .30, M1917 - HISTORY
How much ANY gun is worth is based on make, model, condition, and ORIGINALITY.
I can't see your rifle- you are not holding in close enuff to the computer.
A 17 in very good original condition may be $800 or more. If it has been Bubba'ed up, value drops like rock. Changing sights, cutting stocks, drilling and tapping for a scope, etc.
BTW, one theory is that the M1917 was the rifle used by SGT Alvin York in WW I.