Sunday’s ad is for “Coors’ Golden Bock,” from between 1933 and 1940, although it definitely looks much older. This ad was made for the Coors Brewing Co., who did not do as much advertising as their competitors. In part, this was because they were not sold nationwide until the 1980s. This one is for Coors’ Golden Bock Beer, which as I understand it they only made for a few years just after Prohibition ended in 1933, but given the appearance of this ad, it’s possible they made bock before prohibition, as well, but I couldn’t find anything definitive about that.