The seven Harlequin 9-inch plates shown below are mockups for potential silk screen patterns in the late 1930s. Each one has underglaze hand-painted work which was fired to see how the different patterns would look in their various color combinations. None of the seven patterns went into production. However, had they been approved, appropriate silk screens would have been created based on the hand-painted designs. (A similar process was done for many of the early Brittany screen patterns.)
Interestingly, the base colors were not standard Harlequin glazes. The first three were done in 5309 green, the next two in 3515 yellow, and the last two in 5308 fawn.
These mockups come from the collection of The Fiesta® Tableware Company (formerly HLCCo.)