This is Barbie's PAK knit top, available in 1963 in gold, blue, and multicolor stripes. There is a roll collar and a V back. This PAK also contained white sunglasses with blue lenses and a gold-tone charm bracelet. The striped version of this top was also issued in Barbie's Knit Separates in 1964 and a gold top in her 1964 Golden Evening fashion. These tops are great min-n-match separates and are very easy to find. Mint condition, loose, about $10.