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