Vintag1960s Barbie Lot 1963-1968 Barbie, Ken, Skipper 3 Dolls W/ Clothes

In this lot we have 3 collectible dolls and one badly damaged carry Barbie case selling as is. In this lot we have a Ken doll, Barbie doll with red hair and a skipper doll with original clothing. Both female dolls have snapping legs that have been checked, they both snap in all places just fine. Also the skipper doll feet have no shoes and minor pin hole damage. It seems that there is some obvious discoloration to Ken and Barbie faces by an unknown substance. Not sure if it could be marker maybe.Please advise and investigate pictures thoroughly. Selling the Barbie case as broken/ damaged as is for parts.
PLEASE ANY AND ALL QUESTIONS ARE WELCOME