The “Master Control” collection was originally launched, back in 1992. At the time they were the first JLC timepieces to feature the pioneering ‘1000 Hours Control’ certification, which is where its moniker derived from. It was developed to guarantee perfect execution and the highest level of precision, which would later be applied across the whole Jaerger-LeCoultre catalog. Since then it has been updated in several iterations, leading up to this new pair of limited editions.Both options come in the same 40mm case made out of stainless-steel with a mixture of polished surfaces and brushed casebands. While mounted to the case is a thin steel bezel with a mirror like polished finish as well.On the flip-side both feature a sapphire exhibition case back, which allows a view into the inner workings of the mechanical movement. Where we can observe a gold oscillating weight, designed in the form of the “JL” logo.Although both cases measure in at 40mm the “Master Control Calendar” is slightly thicker at 10.95 mm. Plus it also includes small pushers that allow the user to correctly set the calendar functions. They also come equipped with the standard setting-crown, decorated with a “JL” embossed logo. A heightened sense of depth to its features is brought forth by combining a brushed finished case, with a contrasting polished bezel and lugs. All topped by a sapphire crystal with an anti-glare treatment. Water-resistance on these watches can reach up to 50 meters (164 feet).Both watches exhibit time on a blue dial with an elegant sunray-brushed finish, but are easily told apart by their differing complications. The “Master Control Date”. has been adorned with steel-applied hour index markers and the Arabic numerals: 6, 9 and 12. While circling around the periphery of the dial is a series of subtle minute index markers, with small dotted indices for every 5-minute increment. It also features a date aperture at the 3 o’clock position framed within a steel box.
Jaeger-LeCoultre Master Control Date
The “Jaeger-LeCoultre Master Control Date” (Ref#: Q4018480) is powered by the self-winding mechanical movement, caliber 899 with 32 jewels and 28,000 Vph. Power reserve on this watch can last up to 70 hours, when fully wound.This is a limited edition of only 800 manufactured timepieces. For more up to date information visit the official Jaeger-LeCoultre website here.
Next we have the “Jaeger-LeCoultre Master Control Calendar” with the same steel appliqué hour index markers, but the Arabic numerals: 3, 9 and 12. Besides the previously mentioned ring of minute index markings, further out on this model nearing the bezel is a ring counting down the 31 days of the month. In the upper half of the dial we encounter a double-window for the weekday and current month; while on the lower-half is a sub-seconds dial with a blue sky star-lit decorated moon-phase.
Jaeger-LeCoultre Master Control Calendar
The “Jaeger-LeCoultre Master Control Calendar” (Ref#: Q4148480) is powered by the self-winding mechanical movement, caliber 866 with 34 jewels, 344 components and 28,800 Vph. Power reserve on this watch can last up to 70 hours, when fully wound.Mounted on both watches is a blue leather strap with exposed tone-on-tone stitching, secured by a double folding steel buckle. This is a limited edition of only 800 manufactured timepieces. For more up to date information visit the official Jaeger-LeCoultre website here.