Monoyer visual acuity scale

What a nice chance! Luminous original painting composed of a creamy white metal body supporting a Plexiglas plate screen-printed with letters and numbers: the scale for measuring visual acuity. It was invented in the 19th century by the Lyonnais Ferdinand Monoyer. It is electrified, has a switch on the side and lights up. A trendy and wink object of curiosity. Dimensions: height: 78 cm; width 27 cm and depth 12 cm. Weight between 5 and 15 kg. Condition: excellent condition. This object tells you its story. It is sincere, true and true: in a word, authentic.