Perrelet Turbine XL America Limited Edition Written byMark BernardoJuly 5, 2012 Perrelet has recently made the decision to use its proprietary “turbine” double-rotor technology as the centerpiece of most of its flagship models, including a number of limited editions — like this piece we discovered for our “Salute to America” week, the Turbine XL America Limited Edition. As in Perrelet’s other Turbine models, the 12-bladed, jet-engine-inspired rotor wheel from which the collection derives its name spins over the dial as it provides energy to the mainspring; in this case, it’s pinwheeling over a patriotic red-and-white striped pattern on the dial, creating a dynamic swirl of color, punctuated by the blue squares, with white stars, positioned at six of the hour markers. Each square has either eight or nine stars, for a total of 50, the same amount as on the American flag. The other hour positions are represented by printed red numerals. Click here to see a movie of the Perrelet Turbine XL America. The watch has a decidedly masculine 50-mm-diameter case (hence the “XL” designation) in stainless steel with a scratch-resistant DLC (diamond-like carbon) coating, with glare-proof sapphire crystals in the front and back. Traditional, center-mounted hands, white with blackened outlines along the edges, indicate the hours and minutes while a center-mounted red hand ticks off the seconds. The movement is Perrelet’s exclusive P-181 automatic caliber with two rotors; the one that’s not on display in the front is visible through the caseback, as is the brand’s openworked black-coated rotor. The Perrelet Turbine XL America is limited to 777 pieces (in honor of the year 1777, when the familiar stars-and-stripes was first adopted as America’s national flag). Those who wish to wave that flag simply by showing their wrist can be one of this watch’s proud owners for $7,150. Receive all the news, features and reviews from WatchTime for free! Sign up to our free weekly newsletter and get all the news delivered to your inbox.