Until I moved to Australia, I had never heard of these hard plastic baby dolls that were manufactured in the 1950s through the 1990s in Asia. OK Kader had factories in Hong Kong and Thailand. The Thai factory closed in 1993 after a massive fire killed many workers. There were both black and caucasian versions of these dolls.
Kader dolls seem to be popular among collectors in Asia and the Pacific, and no wonder. They have sweet chubby faces and characteristics unique to Kader dolls: a "clacking" tongue and twist wrists. The tongue is attached to the eye mechanism, so when the doll's eyes close, the tongue retracts and moves side to side. Wrists can be twisted so that the doll's hands can be posed. Dolls have hard molded eyelashes. My doll also wears replacement lashes.
All Kader dolls come with molded hair, although mine is wearing a wig (dolls usually lose most of their hair paint). The dolls may have residual glue on their head seams. I've seen them range in size from 13 to 25 inches (although there may be dolls on either side of that figure.) My doll is a 20 inch doll from about 1960. She has two little teeth in her rosebud mouth. Her matinee jacket and pants probably are not original to her, although I usually see OK Kader dolls for sale wearing knitted baby clothes. Most of the dolls I've seen for sale on eBay are vintage dolls that date from the 1950s and 1960s. Newer dolls have hard vinyl heads.
If you are a collector of dolls from the 1950's, you might want to have a look around for an adorable OK Kader doll.