Vintage 1930s Slingerland Marching Snare Drum/with autographs top head/sports?

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Vintage 1930s Slingerland Marching Snare Drum/with autographs top head/sports? OK
I don't know exactly what these autographs are for sure ? I looked some of them and some come up as playing basketball, football, baseball. The heads are calf skin . Now at some time the stringer tensioners came off instead of putting a nut and bolt to
Hold it , they moved in over! As you can see in the pictures. I've never seen stringers like this one either. I don't know if there signatures of sports players or not but the drum came south of Dallas. Please see pictures and contact me if you have any concerns.