Prewar 5 lb practice bat?
 

Ran across an unusual bat at the antique market today. It had a huge barrel and the only markings were 5lb on the knob. Dealer said it was
A 1930s practice bat. Had a hefty$500 price tag. If that is a good decal send me a message and I'll pick it up for u

Here is a picture. Normal length but very large barrel.