You have probably already...
You have probably already seen it, but the Furniture Index attribution apparently cites this 2001 Wright20 auction as a reference. There is also a dealer on 1stDibs who uses the same image (and may be re-selling the same pair of chairs).
http://www.wright20.com/auctions/view_search/AI06/F57H/509/LA/mogensen_c...
Rago also sold one as...
Rago also sold one as Mogensen. Interesting.
http://shop.ragoarts.com/modern?l=35004
Just came across this link...
Just came across this link that also says Piero Palange & Werther Toffoloni 1974
http://kagu.dk/view.php?categoryid=2&itemid=146
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