Sayco Doll Corporation, New York, NY U.S.A. 1907-1960s - Dolls were sold through mail order, as premiums, to wholesale and to advertisers. Their dolls are made of wood, cloth, latex, hard plastic & vinyl. There is so little information about Sayco dolls, but here are some of the markings on these dolls: ©Sayco Doll Corp, Sayco, S, s, Made in USA, 750 and 14R.