After several years of puzzlement Jim has decided these were made by Hocking. They are part of a dessert set.
The iridescent sherbet was actually made by Monongah Glass. Because Florence and all the other authors have decided to include the Monongah Spiral Optic Vase in the Hocking Spiral listings, he thinks the Monongah sherbet, footed tumblers, pitcher and finger bowl should also be considered part of the pattern.
