Monday’s ad is for “Rainier Club Beer,” from 1948. This ad was made for the Seattle Brewing & Malting Co., who made Rainier Beer, and was later known as the Rainier Brewing Company of Seattle, Washington. This one is using the grammatically questionable “Enjoy The Beer You KNOW Is Clearest Lightest Driest” as its tagline. But that’s not just some bold claim, it’s been “PROVED by Independent Laboratory Tests.”