The Master Compressor Diving Chronograph GMT Navy SEALs.

The Manufacture’s engineers justifiably consider reliability and safety to be indispensable requirements for a diving watch. Accordingly, they have made the 1500-piece limited edition titanium watertight to 1000 meters and the 500-piece pink gold version watertight to 300 meters.

This watch is a member of the very select circle of timepieces that combine the chronograph function with a second-time zone. The new self-winding mechanical movement, Jaeger-LeCoultre’s Calibre 757, operates at a frequency of 28,800 vibrations per hour and has a 65-hour power reserve.

The black and white dial is perfectly legible despite the amount of information it provides: hours and minutes in the centre, chronograph function display on the centre second hand, hour counter at 9 o’clock and minute counter at 3 o’clock. The operating indicator takes the form of a disc alternating white and black with white streaks as it rotates.

Inspired by the hometime/travel time principle patented by Jaeger-LeCoultre, the second time zone indicated by a skeletonized hand is supplemented by a day/night indicator appearing in an aperture at 12 o’clock. The crown at 3 o’clock is flanked by two pushpieces that are covered with black rubber and sport the line’s iconic compression fins – the pushpieces that operate the chronograph.

This highly technical instrument is 46.3 mm in diameter. (Ref. Q1782470 – pink gold, Q1782770 – articulated rubber, Q1782670 – rubber molded)

Posted by:Jason Pitsch

Jason Pitsch is the Founder of Professional Watches. He appreciates good design and engineering in everything from architecture to automobiles to cameras to clothing. Yet his focus for the past decade has remained consistent on covering just one: watchmaking.