Leather bow spectacles with iron bridge. Nord european area, England early XVIII century. Rare and extremely delicate nose spectacles. The thickness of the frame, measuring less than two millimeters , and the flexible iron bridge fastened by rivet pins, made this frame extremely lightweight and elastic but at the same time, not very resistant. The lenses are particularly oxidized. Intransparency numerous micro air bubbles trapped in the glassy mass are visible, which is typical of the earliest productions. The spectacles are contained in a contemporary case made of boiled leather, and embellished with dotted diamond shapes with longitudinal and parallel lines obtained by hot pressure.