This pattern was produced from 1908-1946. The pattern had such a long production run that it is mostly found in Crystal, but can be found in the early colors of Emerald and Canary, as well as colors not used until after 1925 such as Moongleam and Flamingo.
This is the 4 inch nappy in Canary. The bottom is not ground, and it can be found both marked and unmarked.