This is a 1966 Barbie Doll Twist n Turn, made in Japan, which is stamped both on a foot and her bottom. This doll stands at 11 inches tall with straight blonde hair, blue eyes, rooted eyelashes and a light complexion. This  doll features bendable knees which both clicks 3 times.  She has 1966 Mattel, Inc. U.S. Patented, U.S. Pat Pend, Made in Japan on her bottom. 

She is pre-owned and does have a smudge of ink on her left leg and she has light discoloration around her ears. There is no date mark on the back of her head. Overall she appears to be in good shape