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Monocular Opera Glass

Signature Chevellier Ingenieur se S.A.R. Monsieur frere du ROI vis le Marche aux fleurs d Paris

Date Early 1800s
Dimensions English Metric
Main Tube Length 2.0in 50mm
Main Tube Diameter 1.65in 42mm
Total Length 3.6in 91mm
Closed Length 2.8in 71mm
Objective Clear Aperture Diameter 1.3in 33mm

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.

 


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