Hello. I was wondering if anyone could tell me some history of the items pictured here. From what I can tell, they seem to be valves from a soda dispenser, but I was wondering what year they were from, among any other information anyone could give me. The names "Deep Rock" and "Blue Lick" showed up in a web search together in the book "A Treatise On Beverages or The Complete Practical Bottler | by Charles Herman Sulz", published in 1888.
The name plates are made of ceramic. The valves seem to be made of brass with blueing as an outside coating.
If anyone can give me any history on these, I'd greatly appreciate it.