Ghost Ads Guessing Game

I'm sure I'm not alone with these older forms of advertisement and the intrigue they bring. I'm fascinated that they would use the side of a brick building to display their message, but I do suppose the lack of nicely placed flat billboards in town were a few years in the making. So we are left with the guessing game of what product were they advertising.>

There is no doubt, it's a beer advertisement. Pilsener beer of some sort with the word 'Great' in the slogan. Since I know it's local Hamm's Beer comes to mind, but it doesn't fit what I recall about their advertising. So I'm stumped as to what the advertisement was. Any ideas on this ghost advertisement one?