Leonardo da Vinci - Head of an Old Man, and Studies of Machinery (verso), 86.GG.725, about 1503–1506, Leonardo da Vinci, about 1503–1506

Studies for the christ child with a lamb (recto); head of an old man, and studies of machinery (verso); leonardo da vinci (italian, 1452 - 1519); about 1503–1506; black chalk, pen and brown ink; 21 × 14. 1 cm (8 1/4 × 5 9/16 in. ); 86. Gg. 725; no copyright - united states (http://rightsstatements. Org/vocab/noc-us/1. 0/). Date: about 1503–1506.