Vintage Oleg Cassini sailor dress, size small

Vintage cream sailor dress with navy blue trim. Midi length. No marked size, but fits like a small. It closes via a zipper and a bunch of little snaps on the bodice. There's no fabric tag but it feels like a silk blend and it's textured. There's also a tiny blemish on the front; see photos for reference. Marked size: None. Fits like a modern small Waist: 27 Pit to pit: 24 Length from shoulder: 40