Details like wire diameter, the angle the wire is cut, the bend radius of the top corners and the base, and double wire rims on new chairs (although a few double rims were produced in 1953) are ways to spot a knock-off.
The tips in the article are quite specific, also providing information about glides, upholstery, line additions, and the Knoll stamp.
If you love the work of this mid-century designer, you'll want to check out the entire site for more information about the man himself, as well as his oeuvre. His daughter Celia Bertoia is director of the foundation, the mission of which is to spread the legacy of Harry Bertoia. On the website, you can become a volunteer, donate, or simply sign up for the mailing list.
|Bertoia chair lineup|