I believe her to be a number 3. She has a line at the top of her right leg and I'm not sure if it's a mold line or crack.
It doesn't pull apart when touched. Original rubber and in hair and it is aged. Pearl earrings and a tiny bit of green under each earring. Polish is good as is lips and shadow. The item "Vintage 1960's Barbie TM #3 Brunette Ponytail Doll" is in sale since Sunday, June 05, 2016.
This item is in the category "Dolls & Bears\Dolls\Barbie Vintage (Pre-1973)\Vintage (Pre-1967)". The seller is "reeds-relics" and is located in Mineral Point, Missouri. This item can be shipped to United States, to Canada.