S Curved Plywood three legged Mystery Chair


One of my readers would like some help from other reader with determining the provenance of this interesting S Curved Plywood Tripod Chair.

Browsing the web I could only come up with the following more or less similar chair designs:

Bellevue chair by Andre BlocThe Bellevue Chair by French architect painter and sculptor Andre Bloc and

sergio-fahrer-commo_eaBrasilean Sergio Faher’s Commo Chair

However both lack the characteristic rib reinforcing the back. Any ideas?