Perrelet Watch Turbine All Black A1047/2. A fascinating interpretation of the double rotor concept, the Turbine has since 2009 rapidly become the iconic Perrelet model. The collection is the ultimate embodiment of creativity and naturally appeals to fans of innovative horology. Turbine timepieces offer their lucky users a range of optical and visual effects that are unique in the watchmaking world, thanks to the ingenious combination of a free spinning propeller type upper rotor, rotating at full speed in step with wrist movements, and an under dial on which designers can give free rein to their imagination.