B Pirnie -- Sorry,I didn't make myself clear. When I said "drill sheet" I meant the sheet that we keep our drilling records (hole sizes, spans, pitches, etc.) on. We file these and keep them for at least 5 years, but have some from back in the early 80's.
king of the mill -- I'll record the serial number today and post it tonight. Perhaps the January, 91 approval date was the beginning of the formal approval procedure or something of that nature. Guess it doesn't really mean anything, then.
I just went through my old check records, and darn if I didn't find it! Yes, I'm somewhat of a pack rat. I purchased the ball on March 11, 1989 for a total price of $115.80. That was at least twice what I had ever paid for a ball before. -- JohnP