Stunning vintage BIENEN DAVIS lambskin handbag

In immaculate condition, not one blemish inside on the pale rosé pink silk lining. Soft supple ivory lambskin outside. Gold rose closure and chain. A few slight marks only where the metal rubs as it opens. I can find very little info online, I’d love to know more if anybody knows anything about it or it’s worth even? Measures 9” long, 6” tall and is 1” deep on the bottom. 13” chain