Friday’s ad is for Brauerei Münchner Kindl, a German brewer. As far as I can tell, Vivator was a brand of beer sold by the brewery. There’s a small signature block in the lower right corner that appears to be where the artist’s signature would be, but I can’t find a large enough version of the ad to read it. I love how exuberant the man is, stein in hand, singing in what looks like it could be snow, with the Munich skyline behind him.
Vivator was probably their Doppelbock. They usually have names ending in -ator.
Artist is Ludwig Hohlwein. Also responsible for current logo of Franziskaner Weissbier. Brewed in Munich. You can google Hohlwein and Plakatkunst and find a marvelous assortment of posters, illustrations and ad work of this gifted illustrator.