More information would be needed to put a value on this bat. You did not mention the size of the bat, condition, and if the bat was endorsed by a player. Baseball bats without a player endorsement will have low collectors value.
The dating of the bat is one of the most important factors on value along with condition. Hillerich & Bradsby Co. Louisville Slugger has used different oval center brands in their history. By identifying the center label, trade marks, and patens you can narrow down the year to what era the bat was made.
If the bat has the size on the knob it is an inch mark indicating that it is a store model bat. Inch mark- A term used with baseball bats referring to the number stamped into the knob of the bat indicating the length on store model bats. Model number is not an inch mark. If the bat knob reads 3 or 34 it means it is a 34 inch bat.
Louisville slugger began using model numbers on the knob in 1943 then moving the model number to the barrel in 1977.