Alexander Caldas designed it. Here's a link to more information http://aroundthetree.eu/portuguese-roots/

Thanks for the advice all ... think I'll stick with something more modern so I don't need to change the table. My dream would be wishbone chairs .. love them

Elizabeth, you've posted this in the Design Dilemna section. You need to use this link to the shop, where you can look at the products available, then you can see which one you like and which shop sells it through Houzz. Butterfly chairs

Upholsterer here (longstanding hobby not a business). I’m pretty certain that’s the original fabric. I’ve done several PK chairs and they look great in velvets. It was a mass production chair and so you absolutely don’t need to worry about being authentic to the original - choose exactly what you like! They are smashing little chairs, often very comfortable considering that they can be quite petite.