The BKF chair is named after Antonio Bonet, Juan Kurchan and Jorge Ferrari Hardoy, three Argentinian architects working for the Austral Group. It's also known as Hardoy chair (it is said that Hardoy was the main designer), Butterfly chair... It was made in Buenos Aires in 1938, and it was an update of the Tripolina chair. In 1940 the chair was shown at an exhibition and was discovered by MoMA.
These are some of the pictures that inspire me the most. Both leather and canvas; both indoor and outdoor... this chair is amazing!