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Single-Draw Pocket Telescope
|Signature||J. Gilbert, Tower Hill, London|
|Number of Draws||1|
|Main Tube Length||3.3in||84mm|
|Main Tube Diameter||1.4in||35mm|
|Objective Clear Aperture Diameter||1.2in||30mm|
This monocular has a round parallel mahogany barrel, with a push-on objective lens cap. The original objective may have been an achromatic doublet, but it has been replaced with a pair or lenses that are not achromatic. It has one brass draw (with no retention), an eye lens, and a tapered eyecup with a sliding cover. It is signed "J*GILBERT Tower Hill LONDON" on the draw, with the eyecup to the left.
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