I've been doing a little Google searching to see if I can
come up with the answer to the little trivia question that I
presented myself with and may have done so.
I found a site that lists world record progressions. Just
click the blue link of the event and it opens up a new page
with the progression.
http://www.swim-city.com/records.php3?page=records_wrh50
On August 6, 1983, four world records are listed as having
fallen at the Clovis, CA, Nationals which is where I was
competing that day.
Matt Gribble 100 fly Steve Lundquist 100 breast Rick Carey
twice, both in 100 back. The Rick Carey thing was a WR in
the prelims, then beating it again in finals.
It was a heck of a day of really fast swims and was pretty
darn exciting to be in the same water with these guys even
though I wasn't the one breaking the records! Maybe I'm
wrong and am remembering Lundquist setting the 100 breast
WR, then Gribble setting the 100 Fly record later.
I really don't think this is the case because I distinctly
remember a record falling in the consols then being broken
in finals, but maybe I'm just getting old and not
remembering so clearly!