So this afternoon I identified one of my thrifted sets of drinking glasses, by manufacturer and age! I had purchased these vintage clown motif-milk glasses from a favorite thrift store a few months back, and had no idea what the story about them was. While ogling e-bay, I stumbled across a photo of them. I have successfully identified them as being manufactured by Hazel-Atlas Glass Company. They at their peak had fifteen plants, including one right in Oakland, California. They turn out to be quite collectible manufacturer of milk glass. Isn't it nice when that happens? The company was sold in 1964 and with the change of hands, no longer manufactured under the Hazel-Atlas name, indicating that these are earlier. I would guess that they are mid 1950's.