Hmmmm, she's ALMOST looks like a Tressy, except her neck isn't a part of her head sculpt and such...
Hmmmm, if the body was hollow and has no markings I assume she's a clone doll though, because even the more official Barbie knock off dolls like Sindy and Tressy and such have solid bodies. Though it's definitely vintage with the way the hair is rooted and I think the face has a more handpainted/airbrushed look than modern clones. But don't despair about her being a clone since there's a huge following for vintage clone dolls... (I have one and people adore my lil Carrie)
Also, about her dress, if it has velcro it's not vintage. But if it does have snaps I definitely think it could be her original dress...
(Apologies for being so vague, but clone dolls aren't my strong point in the vintage knowledge...)