1989 goldcoast/riviera barbie just picked her up from a local seller and I can't find any information on her other then when she was made and that she goes by 2 different
Riviera Barbie - Etsy
1989 Mattel Riviera Barbie (China) | new doll - dreams come … | Flickr
Amazon.com: Mattel 1989 Western Fun Nia Barbie : Toys & Games