Antique print titled 'Prospectus Pontis Westmonasteriensis Londini - Viso del Ponte de Westmiinster a Londra'. Antique print of the Westminster Bridge, London. This is an optical print, also called 'vue optique' or 'vue d'optique', which were made to be viewed through a Zograscope, or other devices of convex lens and mirrors, all of which produced an optical illusion of depth. Source unknown, to be determined. Artists and Engravers: Anonymous. Condition: Fair/good, original contemporary hand coloring. Shows wear, creasing and a few defects, blank verso. Please study image carefully. Date: c.1770 Overall size: 51 x 38 cm. Image size: 40 x 27.5 cm.