0022Cal.7743
2018/01/06(土) 21:47:18.58ID:gSp+397JSwiss made mechanical movement
https://www.ballwatch.com/global/1/technology/movement---41.html
Dimensions: O 34.24mm, height 5.16mm
Functions: Hours, minutes, sweep seconds and date
Winding: Automatic
Vibrations: 28,800vph, 4Hz
Power reserve: 80 hours
Jewels: 25
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Engineer M Challenger: our first chronometer manufacture caliber
https://www.youtube.com/watch?v=lJmAVJU5gVQ
8振動で80時間パワーリザーブは良いけどデカい香箱で直径が決まって残りスッカスカ…
https://static.watchtime.com/wp-content/uploads/2018/01/Ball_Watch_Caliber_7309_1000.jpg
ってまあ見えなきゃええか