Rare 1970's St. John for Neiman Marcus dance top

Vintage designer ballerina style sweater. Fabric is thick but breathes and neckline is strikingly plunging. Matching tie enclosure feeds through two gold loops at base of top. Olive green background with narrow shimmery gold horizontal stripes. No listed materials, feels like an acrylic/metallic blend, possibly with rayon, hard to determine exactly. Made in the USA by St. John for Neiman Marcus. Listed size is 4 but see measurements to confirm. Bust - 39 Sleeves - 19.5 Length - 19.5