Four synchronized barrels, each containing a metal spring, store enough energy to run the V4 for 50 hours even when you're not wearing it. The barrels turn the movement using 13 0.5mm-wide belts tightened with minuscule turnbuckles to a tension far beyond what jeweled pinions could sustain.. Tag Heuer
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The Engine

A 4.25-gram platinum ingot slides back and forth in a central channel at the back of the watch, capturing power from the wearer’s wrist movements. The ingot is machined with teeth along one edge that engage a cog at the side of the channel, rotating it with each pass.

Watch the Revolution:

Three panels of synthetic sapphire provide a peek under the hood of this chronometer.

The Transmission

Four synchronized barrels, each containing a metal spring, store enough energy to run the V4 for 50 hours even when you’re not wearing it. The barrels turn the movement using 13 0.5mm-wide belts tightened with minuscule turnbuckles to a tension far beyond what jeweled pinions could sustain.
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