I just watched the second disc from the DVD set Classic Commercials, and in the third chapter, labelled "Celebrities", there is a commercial for Old Milwaukee Beer where Tony Dow has the first line "First one in the water has to buy the beer" (They were watching a log-rolling contest and the loser of the contest had just fallen in.). The commercial was dated 1974, so he was probably 29, but he looked probably early-thirties then. This commercial falls about 1:10 into disc 2, IIRC. It was funny seeing him in a beer commercial considering how Wally wouldn't touch beer in Box-Office Attraction. :)

well, yes, but he was in training then.:)