Photo of British Museum Marine Chronometer 1

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DescriptionBritish Museum Marine Chronometer 1.jpg	English: The Beagle chronometer. In the British Museum.
Date	27 June 2010
Source	Own work
Author	Photograph by Mike Peel (www.mikepeel.net).
Permission (Reusing this file)	CC-BY-SA-4.0. Please attribute as per the author line above.

British Museum reference	CAI.1957, L210 / Registration:1958,1006.1957
Detailed description	Marine chronometer, Rectangular mahogany box, lined with green beize, with brass carrying handles at the sides. Hinged lid with glazed viewing aperture and sliding mahogany cover. A key-operated lock at the front. There is an inserted plain ivory disc in the lid front. Silvered brass dial with Roman hours I-XII within a minutes circle. Subsidiary seconds dial above VI. Plain blued-steel hour, minute and seconds hands. Movement contained in a lacquered brass bowl. One-day spring-driven movement, with fusee and Harrison's maintaining power. Jewelled bearings for train wheels in screwed settings. Earnshaw spring-detent escapement with Earshaw split-bimetallic temperature compensation balance and free-sprung helical blued-steel balance spring.
Size	Height: 17.6 cm (6.9 in) Width: 20.8 cm (8.2 in) Depth: 20.8 cm (8.2 in)
Location	Room 39 case 10

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Attribution: Photograph by Mike Peel (www.mikepeel.net).

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Camera manufacturer	Canon
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ISO speed rating	400
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Date and time original image was generated	2010:06:27 11:45:45
Date and time image was made digital data	2010:06:27 11:45:45
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