Episode 331 - 1971 Bally Hole In One

Hole in One - as far as anyone has found - is only a backglass. It depicts a 6 card bingo with a few intriguing mysteries: 1) There is a golfer rating - good, excellent or superior. What is this for? 2) The replay register is masked off and only a single digit is shown. Why? 3) What happened to the rest of the game? How many were made? 4) Did this ever make it into limited production? Backglass: http://bingo.cdyn.com/machines/bally/hole_in_one/resources/bg-hole_in_one-1.png