From memory the lyric went "Come on and get your tankards filled it's the start of a new age,the Alpine age."
Problem is I do remember the ad though I was only 3 in 1965.
As an aside the advert heavily implied that this was a German product though a Scroogle search shows that Alpine is a Canadian Lager.
It might help if we could find out how long this advertising campaign lasted.
Does anybody else remember it?