A Vintage Theo. Hamm Brewing Company Advertising Bottle Opener. This Theo. Hamm Bottle Opener reads: "Theo. Hamm Brg. Co." and "St. Paul, Minn." on one side and "The Beer Refreshing" and "Vaughan Chicago" on the other. The Bottle Opener measures 3 1/2 inches long and 1 3/8 inches wide. It is in nice condition.