Anne Fogarty Vintage 50's Black Ribbed Modest 3/4 Sleeve Coat Nurse Coat EUC

Anne Fogarty Vintage 50's Black Ribbed Modest 3/4 Sleeve Coat Nurse Coat EUC. Collar and one button closure. I really do not know what the material is though the outer material does feel like a silk blend. I could be 100% wrong. It is silky, smooth, but ribbed and very well-made. The inside lining shows discoloration. But no rips or tears. There is no tag to tell me what type of material this is. It also has two pockets and the sleeves are three-quarter length that are cuffed. I also took a picture of the left cuff/sleeve that shows a little bit of worn material. It is on the inside and cannot be seen when wearing it. Armpit to armpit laying flat 23 inches. From shoulder to hem approximately 43 inches.