I'm 65. When I was 4 or 5 (so around 1963/4) I was given a black dolly on my birthday.
Not a baby nor a Barbie type. Red dress with white polka dots, gold earrings, short hair in big styled curls. I thought she was utterly beautiful. Till I read this it never occurred to me that it was odd, but I don't recall any other black dolls at that time.
Can't ask Mum why she got it for me (has died) but knowing Mum I think she just really liked how pretty she was.