Instagram post by @de_bethune De Bethune

The result is as simple as the #lighting of a bicycle 🚲fully #mechanical with no electronics and no battery.
A pusher at 6 o’clock activates a small gear train driven by the twin barrel.
This gear train, by means of a miniature dynamo, provides the necessary #energy for lighting the watch
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#debethune #sihh2019 #db28 #grandbleu #divewatch #db28gs #luxury #watches #watch #watchaddict #watchfam #watchporn #watchgeek #horology #swiss #swissmade #instawatch #dailywatch #tourbillon #watchoftheday #watchmaking #art