![Portrait of Leonardo da Vinci attributed to Francesco Melzi](https://cmsadmin.rct.uk/sites/default/files/lead_image_half_height/RC1894_Leonardo%201600%20x%20625_Yellow.jpg)
Studies of a baby
c.1490RCIN 912568
8-spoked large wheel. Diameter: 51 mm ext., 10 mm int. Briquet's comparable examples (13221, 13222, 13227) are all mid C14th. Smaller versions 13229, 13230 are late C15th. All northern Italian (Padua, Venice predominantly)
stamp, ER VII, crowned, in oval: Lugt 901