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http://www.thewatchbox.com Jaeger-LeCoultre's Reverso only gets better with time. After parts of nine decades on the market, JLC's iconic watch continues to cut the same "golden ratio" art deco profile while adding new tricks. The bigger, bolder, and mechanically refined Reverso Grande Date 8 Days packs a unique in-house eight day power reserve into a case designed to suit modern century tastes. Its 46.5 mm "XGT" case pulls the once-38mm Reverso out the early 20th century and into the 21st. The Jaeger-LeCoultre Reverseo Grande Date preserves the classic proportions of the traditional Reverso while increasing the absolute dimensions to thrive in a world dominated by 40mm+ Patek Philippes and 43mm Vacheron Constantins. Jaeger-LeCoultre is known for its Reverso, but the Le Sentier watchmaker also is famed for its superb engineering chops. JLC created a revolutionary eight-day movement for the 2002 "Septantieme," the limited-edition 70th anniversary Reverso. That movement proved so challenging to design and package that the "70eme" didn't debut until a year after the 2001 Reverso anniversary celebration. But the wait was worth it. JLC's Cal. 879 in the Septantieme became the Caliber 875 in the Grande Day 8 Days. From the dual mainspring barrels in series to the superb metering of force throughout the eight-day run, the most significant elements of the $94,000,000 70eme movement are employed in the Reverso Grande Date. When the Grande Date debuted in 2003, it featured the proverbial Ferrari engineering at Mustang prices. Fun fact: while the movement is rated for accurate operation over eight days, owner experience has proved the watch capable of nearly ten days of continuous function on a single full wind. On a watch named "Reverso Grande Date," one would expect the “Grande” date display to occupy a position of prominence, and JLC doesn’t disappoint. The patented twin-disc system was developed by Jaeger-LeCoultre after the watchmaker’s original double-date became a hand-me-down gift to startup sister firm A. Lange & Sohne. Jaeger-LeCoultre leverages the second side of the Reverso's revolving case to place the picturesque caliber 875 in a place of honor. The entire case back is dedicated to the window exhibiting the form-fit movement that was designed specifically for this case shape and size; among high-horology houses, this kind of movement tailoring is a mark of special competence and distinction. While the appearance of finely-finished movement architecture is becoming in all cases, the caliber 875 received conscious input from JLC’s Art Department in order to optimize the symmetry and flow of the bridges, wheels train, and balance structures. Cotes de Geneve, anglage on all sheer edges, and cobalt-blue oxidized screws complete the picture of traditional Vallee de Joux elegance. The bigger, more refined, and more modern XGT Reversos helped to start the phenomenal run that JLC's classic model has enjoyed for the last decade-plus. Arguably more loved and hipper than it has ever been, the Reverso of today is basking in the warmest public embrace since its 1931 debut. Larger models like the Jaeger-LeCoultre Reverso Grande Date 8 Days, are the reason for the icon's contemporary resurgence. See it in high-resolution images on www.thewatchbox.com Video and content by Tim Mosso.