California / Vermont

On May 08, 2104, this "Rod Iron & Leather Side Chair. Wood Arms California" was sold at Michaan's auction
The estimate was $1,000 to $1,200 and it sold for $2,500.

Of course all "unknown" iron furniture comes from California. 

Well, it turns out "The Putney Chair" was from The Putney Graduate School of Teacher Education in Putney, Vermont

Source: FleaBay