Here is a Coopers Old Bohemian Beer Sign from the Cooper Brewing Company located in Philadelphia, PA. This Coopers Old Bohemian Beer Sign is from the 1930s / 1940s era and is in excellent condition considering how old it is.
The sign was made by the Gillco Glass Sign Company located in Philadelphia, PA. It is made of a curved piece of reverse-painted glass with a chain hanger. Signs like these would hang on the walls of taverns to advertise Coopers Old Bohemian to patrons.
There is another variation of this sign which advertises Manayunk Famous Beer under the Cooper Brewing Company name and was also produced by the Gillco Glass Sign Company. I am actively looking for that variation to add to my collection; please contact me if you have one and are interested in selling it.