This cup with pretty shades of blues flowers has the Mt.Clemens mark from 1967. I only find this pattern listed under Salem China as Blue Flowers American Ironstone pattern SLM60. Interesting little cup.
Quantity Available: 1
Size: 2 3/8" high, 3 5/8" across top
Colors: blue, lt.blue,aqua, golden yellow, green
Marks/Labels: MCP in square with water pitcher, USA underneath square
Condition: two long crazing lines? on inside near rim.One line on outside