To me... she looks like a #5 ponytail Barbie (she should be marked Barbie on her bottom)… later dolls will be marked Barbie & Midge on the bottom.
She is from about 1961-63. She could be cleaned up a bit and is probably worth $50 - $65 U.S. assuming she has no green discoloration on her ears from the metal posts in her earrings.
The dress she is wearing is called Friday Night Date.
Hope that helps!