Black Satin Ruffled Slingback Boudoir Slippers Shoes "Frou Frou" circa 1930s

Hoarded for years. But I never wear them and they need a home! Super rare 1930s Daniel Green boudoir slippers in black satin with vamps and heel strap. These were designed in 1939 and called "Frou Frou"! Very, very rare. 

Elastic heel strap, peep toe. Minor wear to soles, size 7.5 (but fits a 7 as well)

Measures

10", 3" wide, 3 1/2" heel