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.Tag Heuer
Watch the Revolution:
Three panels of synthetic sapphire provide a peek under the hood of this chronometer.Tag Heuer
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.Tag Heuer
