I finally found this mint doll after searching for her for many, many years. She's the rarest of all "vintage" (mod) Skipper dolls.
A gorgeous, exceptionally pretty Skipper with brown eyes, eyelashes and wonderful, very long dark brown hair (and a brown scalp).
I got her from the original owner who stated she got the doll either in 1970 or 1971, so it is quite possible she indeed was available prior to 1972.
You can find more info on this doll on the Japanese Skipper page: