butaca BKF es Hardoy chairs en

Chairs designed in Buenos Aires by Antonio Bonet, Juan Kurchan and Jorge Ferrari Hardoy, having steel frames and slinglike one-piece fabric or leather seats. Though commonly referred to as a butterfly chair because of the distinctive shape of its frame, the official name is the B.K.F. Chair, which credits its three designers. The lightweight and inexpensive chair became hugely popular in the U.S. from the 1950s, particularly on the West Coast, where it was frequently used as outdoor seating. The chair was produced by Artek-Pascoe from 1941 to 1948. Knoll Associates acquired U.S. rights to the design in the late 1940s. Unauthorized copies continue to be made.