1950s black chiffon semi-sheer micropleated tank cami

vintage 1950s to 60s micropleted cami or tank. due to micropleats it stretches horizontally. the topline does not stretch. it goes on over the head. it looks fantastic over tight long sleeve tshirts and even over sweaters. it is semi sheer. see photos. no size label and no content label. it feels like a thicker chiffon but I do not know if it is real silk. I am a size 6 and as you can see it fits over a flannel shirt but please see measurements of topline. excellent condition. I handwashed and line dried and it is ready to wear.