Anyone know this Thonet chair?  

MOMA slides
Vermont, that would be a great set of slides to see. I hope you're able to digitize them and perhaps put them all on a photosharing site such as flickr. It must be an amazing set of photos.

Yes!
Jinx,
That would be my chair! I was able to find more examples by googling Brunner stacking chair. Apparently it's made by Brunner (not Thonet - I wonder why mine has a Thonet tag on it?), and it's called Golf. Designed by an Italian designer named Francesco Zaccone.

CBS' "Sunday morning"
just did a nice piece on the history of the most popular chair ever made...the Thonet #14. Fascinating.

same chair
i just picked up the same chair with thonet sticker underneath. very curious. my friend was named thonet after her parents dining room chairs.

Just bought 6 and was researching...love this forum! Very helpful
I was thinking about reupholstering mine, but see that you took yours from fabric to vinyl...and, at that, almost the identical color. Interesting they're called the "golf" chair, because I had just described the green to someone as exactly that! Mine read either "Thonet" or "Shelby Williams Industries" underneath. Is this the manufacturer? Do you suspect that they were recovered to the green vinyl outside of the manufacturer/distributor, hence the different tags? I thought the arms might be maple. Did anyone find out? I'm using them as dining chairs, and have cast my matching steelcase sidechairs to the wayside.