Because they are soled felt dancer's slippers it crossed my mind that they might be wartime Capezio for Claire McCardell - however, none were ever beaded by Capezio, so I thought they might have been customized for a theatrical performance but the addition of the professionally woven label suggested they were commercially made for resale, which is why I thought they had to be European post war.
The link Lynne found solves the mystery, however, some of the information is faulty. There were never any jewelled slippers shown with Claire McCardell's clothes - they were all plain felt, cotton or leather by Capezio, and Maginel never received a Coty award - that was Capezio. It sounds like Maginel bought the finished shoes from Capezio and then decorated them at home, as a cottage industry. I found Maginel's obit from 1966 and it said her shoes were sold through America House, which was a consignment craft store in New York open between 1940 and 1971. They sold hand thrown pottery, hooked rugs, hand carved salad servers... that kind of thing...