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Larry started the Bozo television show then franchised Bozo so each television station would have a local Bozo actor. One of the actors, Willard Scott (who went on to be a Today Show weatherman), used Bozo as the inspiration for the character of Ronald McDonald.
Ok, back to History Detectives...a lady had a Ronald McDonald costume and thought it might be the original. The episode followed show researchers as they tracked down clues and information about the costume. It ended up not being the original, but it was the first Ronald McDonald costume created for national production and for someone other then Willard.

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If you've never seen History Detectives you need to check your local PBS listings!