Interesting chairs  

They look neat.

Adding a comment to get a notification if someone is able to pin point the source.   

You could try asking the owners, Ligaya Tichy and Russel Simmons.  They are very high profile and easy to track down online.    

Not a bad idea, thanks.

I just logged in to Dwell+, in the article it says "The Utrecht chair is by Gerrit Thomas Rietveld from Cassina", but that can't be right, or at least I can't find the right one somehow...

The Utrecht chair is this one shown on page 64 in red under the stairway.  I have the print edition and did not see any reference to the two white chairs in the article or the "sourcing" info.    

Ah, there it is. Yeah. Maybe they're prototypes or something 🤷‍♂️

Thanks!