Mattel's Casey dolls were produced between 1967-1971.
She had a new head mold -shared with Twiggy-, a pink complexion, blue eyes, full rooted lashes, an open closed mouth with molded painted teeth and rooted hair styled in an asymmetrical mod cut. She shared the new twist waist Francie body with the slimmer build, bendable knees and flatter feet.
What's it worth? Take a look at this Casey price guide: sold listings for a value indication.