Gayle is an 11-inch fashion doll distributed in the US by Louis Marx in 1978. Gayle's friend Sindy originated in England in the 1960s, manufactured by Pedigree but was later distributed in the US by Marx. The 1970s Sindy and Gayle share the same sculpt. Pedigree also made dark-skinned Sindys for the British market. Active Sindy was an articulated ballerina and a non-articulated Sindy shown here. Gayle was sold exclusively in the US.
Without their original clothes and original hairstyles, black Sindy and Gayle will look alike. Made in England is marked on the Pedigree dolls (if there are other marks, I am unaware of those). As documented in Black Dolls an Identification and Value Guide 1820-1991):
Gayle's head is marked:
The body marks are:
The book continues: "1978. Gayle was a friend of Sindy..."
For the head mark of "1077," I am not sure if that was supposed to read "1977" since the doll was released to the market with a box date of 1978.
Sindy and Gayle remain popular, but dark skinned Sindy's are the most popular and highly sought. Gayle holds her own with reference to value and price commanded on the secondary market. I have had my 1978 Gayle since the late 1990s and paid $75 for her then. I recently reconnected with the doll while looking for my Mego Diana Ross.
Gayle was stored on a shelf with Mr. T., Pilot Barbie (that I didn't know I owned), Radiant in Red Barbie, Doctor Barbie, Working Out Barbie, Totally YoYo Nikki, Hollywood Nails Christie, Generation Girl Nichelle, Baby Sitter's Club Jessie (the playscale version), Sharnell (a fashion doll by Fiesta), Father-to-be and Mommy-to-Be dolls, Bead Blast Barbie, Cut and Style Barbie's box only, Magic Moves Barbie (I thought I'd found Ross until I pulled this box out fully), and several other boxed, long forgotten fashion dolls.
Sindy is said to be England's answer to Barbie, but she and Gayle remind me more of Ideal's Tammy. Perhaps Tammy is America's answer to Sindy.
More info on Sindy and Gayle dolls that were made for the American market can be read here.