CON­STANT FORCE

UN­CHANG­ING PRE­CI­SION FROM THE START TO THE END OF YOUR WATCH’S POWER RE­SERVE CY­CLE – THREE BRANDS SHOW HOW

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Se­lect pieces that al­ways stay ac­cu­rate

It’s not some­thing that you’d typ­i­cally think about, but me­chan­i­cal watches are a lit­tle like hu­mans. Just as most of us are sharper and more en­er­getic at the start of the day, watches tend to be more pre­cise when fully wound, and less so when their power re­serve dwin­dles. This chal­lenge of un­du­lat­ing pre­ci­sion – known as con­stant force – has plagued watch­mak­ers since the dawn of me­chan­i­cal time­keep­ing. Their holy grail, so to speak, is to find a way that de­liv­ers an un­vary­ing rate of en­ergy and torque, so that the watch’s rate of tick-tock­ing never changes. This year, three brands take on the con­stant-force chal­lenge, each of­fer­ing a unique take on how to re­solve the is­sue.

(from left) IWC - In­ge­nieur Con­stant-force Tour­bil­lon. Ro­main Gau­thier – Log­i­cal One. Gi­rard- Per­re­gaux – Con­stant Es­cape­ment

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