From my research this is the Cameo pattern made from 1930-34. There is another design with a dancer in the centre called Cameo Ballerina. It has an overall diameter of 7 1/4" and is called a Domino Tray, designed to hold a creamer in the centre with sugar lumps round the outside. The original pattern was Springtime by Monongah glass, Anchor hocking bought them out. There is quite a lot of this pattern around but I've not found another of these trays.