Pocket telescope

The tapering barrel of this achromatic telescope is covered in leather. There are two brass draw tubes and brass fittings, including a pivoted eyepiece cover. There are also two lens covers which are attached to the barrel with a carrying strap. The maker's name is inscribed on the smaller draw tube as 'Troughton & Simmns London.' The number II has also been roughly inscribed in a number of places, presumably during production. There is also an engraved stop line on the larger draw tube.

Object Details

ID: ZBA1207
Collection: Astronomical and navigational instruments
Type: Pocket telescope
Display location: Not on display
Creator: Unknown; Troughton & Simms
Date made: circa 1830
People: Airy, George Biddell
Credit: National Maritime Museum, Greenwich, London, Airy Collection
Measurements: Length: 179 mm (closed); 416 mm (fully extended); Diameter: 35-47 mm (barrel)