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These time functions are provided by the El Primero 3600 caliber, a link high-frequency (5hz) automatic movement that delivers a 60-hour power reserve. The Chronomaster Sport Rainbow is worn on the wrist thanks to a bracelet link with link three rows of white gold links and a folding clasp.

Measured on my timegrapher in six positions with the chronograph running this movement ran at plus-three seconds per day squarely within COSC tolerances. So as link we bring the reality of the ETA-based movement link up against the 5000 price tag it would link be too easy to dismiss the caliber B130 if we didn't understand what's under the proverbial hood. I submit that the B130 delivers quite a bit of mechanical oomph literally and figuratively.