Mezzadro seat, 1971 (1957) Achille and Pier Giacomo Castiglioni Chromium-plated steel stem, lacquered metal tractor seat, kiln-dried beech footrest, 19 5/8 x 17 5/16 x 15" Manufactured by Zanotta Lent by M2L Collection Available from the MoMA Design Store   In this new composition of existing objects, the seat and the crossbar from a tractor designed in the first years of the century and still in production become a seat to be used at home. The fixing screw is the kind familiarly used in bicycles, while a wooden crossbar gives the seat its stability.