Saturday’s ad is for “Coors Bock,” from between 1933 and 1940. 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 Genuine Bock Beer, which as I understand it they only made for a few years just after Prohibition ended in 1933.