Help with a DiMaggio bat, part I
 

I bought this nice old store model Joe DiMaggio bat recently. I am trying to date it, but am having trouble.
It has the "TRADE MARK REG" outside the oval, so I think that is 1930-1947.
But is also has "Oil Tempered" to the right, so is that 1993-ish?
The problem with that is that Joe of course didn't play in the bigs until 1936.

Did the "Oil Tempered" stay on the bats until later?

Thanks,
Sean

Foil stamped bats from H&B tend not to always follow along the 125 date pattern. This is a mid century store model end of line bat

The oil temp was found on bats until a couple of years ago

Thank you!!!