Crocks! Remember, these were the equivalent of their Tupperware in the 1800s. Obviously, not blue and white, but blue and a varying tan color.... but the Cobalt blue in their designs is very dramatic in a primitive blue design/décor!!!
Flow Blue - Grandmother gave me a set of flow blue plates that she got when she was married in 1907. The workers who made it later had severe health problems from lead or whatever was used to make it flow.