Just a little bump to show what I picked up 6 days after I picked up this ball (1931 Senators et al), also at an estate sale, for $22.50!
And, YES, that is a King of Pop signature as a bonus!
1966 Pirates
The best two sports items I've ever found at estate sales came within a week of each other. I'm sure it will be 6 more years before I find something else good.