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21 Jewels

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Pictured: Burlington Watch Company Advertisements, The Courier-Journal, September 10, 1916 (19 Jewels) and October 8, 1916 (21 Jewels). In October 1916, the Burlington Watch Company upgraded its 19-Jewel product line by introducing a new generation of 21-Jewel movements. The accompanying image exhibits the modification in...
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