vintage black keyhole sheer top with built-in cami

Vintage black top. 3/4 sleeve sheer top layer with keyhole neckline. Has a built in black cami underneath. Brand tag has been removed - the only tag is a size 6 tag on the inner cami. Feels like silk. In good used condition aside from missing tags. Approximate measurements from flat lay: chest: 17" length: 22" sleeve: 20"