[Deertick]

From a military document a year prior. Not so unique as others. There is a subtle but distinct difference between filling in your name and signing something. IMO.
Although I agree that it would not be common for someone to fill out his own receipt, it is not impossible. I am using the logic that if he filled out other portions, that combined with the overall similarity of his signature leans toward it being in his hand.

Looking at handwritten letters, the similarities and tendencies are very similar to the other portions of this document. This is where I formed my opinion. The word that may have be most useful is "seventy" if anyone cares to research.
FWIW, I went into this looking to prove it wasn't Matty. I took the same approach when Shale posted an A's lineup card that turns out was filled in by Jimmie Foxx.