Vintage Yellow Sleeveless Knit Top

Vintage Yellow Sleeveless Knit Top - in good used condition. Bought this at a vintage shop years back, I think it is from the 60’s? There are no tags anywhere. The material is stretchy, it feels like an acrylic or nylon blend. The seams on either side are slightly unraveling, but this would be an easy fix. There is also a small, small stain on the front that looks reddish, but it’s not noticeable unless you’re looking for it. Would fit a size small. Measures 18.5” across chest and 20.5” from shoulder to bottom hem