A friend of my husband pointed us to these “Case Study” fiberglass side chairs available in 12 colors @ $239 plus $35 shipping. I’ve certainly seen both of these styles (and there are more on the website) on ebay – these look to be terrific reproductions. From modernica.net.
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I had a chair that looked EXACTLY like that from Ikea. And it cost like $30, total.
We had those chairs in high school!! Would be in the late 70s, early 80s!