Lot 363: Harry Bertoia. prototype Diamond chair. c. 1952, welded steel wire. 30½ h × 33¼ w × 26¾ d in. result: $24,000. estimate: $30,000–40,000. This chair was handmade by Harry Bertoia in his studio in Bally, Pennsylvania and it precedes the earliest stages of the wire chairs manufactured by Knoll. This prototype has a deep seat with armrests that rise in a very steep manner, differing from the final form. Because it was intuitively constructed by hand, the form is slightly asymmetrical…