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Description: | STANLEY//GREAT TURNSTILE, HOLBORN, LONDON OPTI MAP//PATENT APPLIED FOR
Brass cylinder with 5 x 1" (12.7 x 2.5cm) aperture cut in its side. A magnifier dia. 1" (2.5cm) is mounted above the aperture on two parallel brass rods which allow it to be moved over the length of the aperture. Inside the cylinder is a glazed map of England and East coast of Ireland, which can be rotated by a brass milled knob at base and which is viewed through the aperture and magnifier.
Inscription.
caption: Record Shot - Do not reproduce. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | ballooning instruments | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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