I purchased a James Stewart autograph recently from Regan's Autographs (seems legit...anyone know anything about them?), and I was curious as to its authenticity. It seems to be an early signature, and the Jimmy looks right to me, but the Stewart seems a little off...maybe it was just rushed? Would love to know your thoughts!
The negative space and downward "shape" or "space" created by the "Ste" can be seen in many of those you posted, as well as the corresponding alignment of angles. I did not look at any stickers.