Here’s a nice collection of vintage and retro modelling pictures of Thai women. Some look like they’re taken from catalogues but most likely they’re from glamour magazines.
The chicks are all fully clothed, but that’s not to say that further in the set of pictures from the mags they would not have disrobed.
Either way, given that naughty magazines were illegal in Thailand back then, and still are, the chances are that these pictures would have been from an underground publication circulated in secret. They were released by Tiane Doan na Champassak but I doubt the authorities would take issue with them now, so enjoy.