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Portable telescope
This non-achromatic telescope has three draw tubes made of vellum. The barrel is also made of vellum and has tooled decoration. The other fittings are made of horn. Black stop lines on the draw tubes indicate the telescope's optimum working length.
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Object Details
| ID: | NAV1550 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Portable telescope |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1690 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 355 mm; Diameter: 45 mm |
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