ANTIQUE COCA COLA BOTTLE?

My mother bought a six pack of supposively antique coke bottles which i believe are from between 1958 to 1965 from what i have looked up but i would love to have another opinion especially if someone really knows about these....But it is a 6 1/2 oz bottle and it says coca cola across the front and back and it has the trademark under it and the 6 and a half next to that...On the bottom it says Lexington , Ky around the outter edge and then in that circle it says bottle trademark....It is a twist off and not a screw on ...any help would be appreciated...