For Amusement Only Em And Bingo Pinball Podcast

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