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Collection Home > Telescopes > Monocular Multiple-Draw > Four-Draw Brass Opera Glass
Four-Draw Brass Monocular
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| Date | Early 1800s | |||||
| Number of Draws | 4 | |||||
| Dimensions | English | Metric | ||||
| Main Tube Length | 1.0in | 26mm | ||||
| Main Tube Diameter | 1.7in | 43mm | ||||
| Total Length | 2.8in | 70mm | ||||
| Closed Length | 1.2in | 31mm | ||||
| Objective Clear Aperture Diameter | 1.4in | 35mm | ||||
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Description |
This monocular has a short round parallel barrel, covered with a textured band of gold-colored metal. The objective is an achromatic doublet. It has four brass draws (lightly gold-plated). It is likely that there were originally six draws. The single eye lens is a replacement and appears to have been mounted in the back end of the fourth draw. The eyecup is missing. It is not signed by the maker. |
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