1970's Cinninati Reds autographed baseball

I found this in my late uncle's estate. He was a big Reds fan. It has no COA with it, but I fell 99% sure it is the real deal. Some of the signatures have faded some but the ones still legible are...Pete Rose, Tony Perez, George Anderson, Joe Morgan, Johnny Bench, Ken Griffey and others. There's 27 autographs in all. It's NOT for sale but would like to know a value. Thanks for looking.