I was playing initially alone at The Barton Creek CC, in Texas, on 12/29/95 and then joined a twosome on hole #10. On hole #13 with yardage of 142 yds, I was between two clubs, and decided to just hit a smooth 9 iron. After hitting the shot, I thought I was short, one of the gentleman I was playing with said I was long, and the other said it was in the hole.
And yes, when we arrived at the hole, my #4 Titleist tour 90 was in the hole.
This was Ben Crenshaw's course, and later I received a congratulation letter from Mr. Crenshaw as to this event, informing me that in Bobby Jones entire career, he only had one "hole-in one"......and this was an unique club!