Rawlings game balls with commemorative stamping, while commonplace today, were a new innovation in the late 1970's and early examples are quite tough to come by today. The 1979 WS and AS balls are MUCH easier to find, making this the key ball of the lot. The hole from mounting doesn't help, but is likely made up for with scarcity. As far as value, I have no idea. Short write-up here:
http://photos.bigleaguebaseballs.com...seball.jpg.php