Looking for some help!

[Mustang1]

Hi all,

I am new to the forum and am seeking some help from the experts. I came across a baseball that belonged to my grandfather who lived in Long Island. When he was a kid he carried this ball to the games and got atleast 7 signatures. Here's what I have so far.

Babe Ruth
Joe DiMaggio
Lou Gehrig
Dizzy Dean
Jimmie Foxx
Ken Holloway?

Then there is a signature that looks like Allie May? Could it be Alllie May Schmidt? and lastly theres a signature that I cannot read in between Foxx and Allie. My questions are this,

1. am I correct on the signature?
2. I Authenticated what would be the value of this ball?

I know its rare to have DiMaggio, Ruth and Gehrig on the same ball being they played at different times, any help would be greatly appreciated!

Thank you in advance for your help!