Know it had to be after 1963 when Willard Scott started the voice of Ronald McDonald!
I know Barnes & Noble has books on McDonald collectibles. Maybe the local library if noone else pipes in here!
Seems your doll was produced in the 70's and if you notice the hole in his mouth - came with a whistle! When you put the whistle in his mouth and press his stomach he blows the whistle. They are all over the internet for sale ranging from $25 to $100 depending on where in the world you live and are trying to sell!