I came across this while web surfing.
Its the introductions and part of the first round of the original CBS radio broadcast
Russ Hodges,Jack Brickhouse from Yankee stadium
of the Joe Louis vrs Ezzard Charles title fight of September.27.1950.
The site claims this is a "lost" recording(although it also says its taken from a 78 rpm album).
ps click under the swirling thing in the upper right corner of the web page to download
http://www.lp2cd.com/time/40/40009.htm