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Home > All Images > 1996 > November > 7 Nov 1996

Images Dated 7th November 1996

Choose from 9 pictures in our Images Dated 7th November 1996 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Internal cogs and gears of a 17-jewel Swiss watch Featured 7 Nov 1996 Image

Internal cogs and gears of a 17-jewel Swiss watch

Watch cogs. Internal cogs and gears of a watch escapement. The red circles are ruby jewels used in bearings. An escapement is a device within a watch which provides periodic impulses to the balance wheel that helps to regulate time- keeping. Jewels, whether natural or man-made, are used in watch bearings because their smooth surfaces offer little friction resistance and are hard-wearing. Photograph of a 17-jewel Roamer watch from Switzerland

© DAVID PARKER/SCIENCE PHOTO LIBRARY