This is a 1964 Ponytail Swirl Barbie. They had a limited run of about two years. They were basically the last dolls to represent '50s glamour. It makes them really valuable to collectors.

add a high ponytail with curled bangs ... Barbie’s collared look – Preppy and pretty in pastels Barbie’s collared look – Preppy and pretty in pastels (Pinterest) The collared Barbie ...