In 1964, Topps began inserting metal baseball player coins into its wax and cello packs. With variations, there are 167 different pieces in the set and it is loaded with stars and HOF players of the day. Highlights include: Mays #80 8, Koufax #106 7, Mickey Mantle #131 (6) All PSA 7, 6 left handed 1 Right Handed, Yastrzemski #134(2) PSA 8 and 7, Aaron #149 (3) 7, 8, 8, Clemente #150 7, Mays 151(4) 7,7,7,8 . The average grade is PSA7 NRMT overall