W. Burnett 倫敦，機芯號 5439，80 mm，約 1700 小巧的附鬧鈴裝置銀座鐘，藉由錶盤的時針啟動鬧鈴功能 W. Burnett, London, Movement No. 5439, 80 mm, circa 1700A small silver table clock with applied mechanism for alarm that is triggered by the hour dial #43515
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