I've been a collector nearly 30 years. As a Police Officer, I incorporated my hobby in to my work, and studied Forensic Handwriting Analysis. I came across this Mantle, and it caught my eye. I noticed several key similarities, and only a few irregularities at glance. Upon comparison, and under magnification, I see no irregularities in the flow. I find no irregular impression points. Nor, do I see any dragging in the flow of the pen. I've had several Mantle collectors say it is a fake.
Needing more insight, I hired Richard Simon to offer his opinion. As well respected as Richard is on Yankee items, I trust his opinion. He seemed it good. A friend who works at the FBI Crime Lab with Forensic Handwriting, also viewed the signature, and agreed it is good.
That said, there should be little question as to the findings. Thoughts?
I will post photos of the ball, and my comparison exemplars from various years.