File:Pocket Watch Balance Wheel.jpg

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current16:41, 19 June 2007Thumbnail for version as of 16:41, 19 June 20071,612 × 1,612 (287 KB)commons>Chetvorno{{Information |Description=A bimetallic temperature compensated balance wheel from an early 1900s pocket watch. 1.8cm diameter. The rim is made of two bimetallic semicircular arms. As the temp. increases, they bend inward, causing the balance to oscill

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