Description

This monocular has a short round bell-shaped barrel, made of ivory.  The objective lens is an achromatic doublet, contained in a brass cell.  It has one brass draw (without retention), a single eyelens, and a flared brass eyecup.  All the brass parts are silver plated.  It is signed "Chevallier Ingenieur de S.A.R. Monsieur frere du ROI vis le Marche aux fleurs d Paris" on the draw, with the eyecup above.