Jaeger-LeCoultre Master Compressor Diving Chronograph GMT Navy Seals ref. Q178T677 – Full set

The watch is a very sturdy titanium Jaeger-LeCoultre Master Compressor Diving Chronograph GMT ref. Q178T677. Made in a limited edition of 1500 pieces in collaboration with the U.S. Navy SEALs – the elite diving unit of the American Army. It features a 44 mm case with scratch resistant anti-reflective sapphire crystal, JLCs Compressor style buttons/crowns that are secured and released by an easy half-twist and a black unidirectional ceramic bezel. The dial is black as well, with luminescent dart hour indices and luminous stencil-style white Arabic numeral markers at 6 and 12 o’clock. Very easy to read skeletonized black hands with luminous inserts including an arrow tip for the minute hand. The Master Compressor has some very interesting functionalities – a date aperture window between 4 and 5 o’clock, a chronograph, a GMT and an operating indicator that takes the form of a disc alternating white and black with white streaks as it rotates. The last one is inspired by the hometime/traveltime principle patented by Jaeger-LeCoultre. The second time zone is indicated by a skeletonised hand supplemented by a day/night indicator appearing in an aperture at 12 o’clock. The watch is resistant to 1000 meters and is powered by the inhouse JLC cal. 757 with a power reserve of 65 hours. Our offering is in very good condition – first purchased from an AD in 2010 and worn very carefully, with only a few minor hairpins to be found, mainly on the bracelets rubber. Ticking as per specs. Comes on the original black rubber bracelet with a triple folding Titanium deployment buckle, in full set – all boxes and papers are present.

Covered by a limited warranty of 6 months, starting on the date of purchase.

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Additional information


Master Compressor Diving Chronograph, Master Compressor Diving Chronograph GMT

Reference number



Very good

Year of production


Scope of delivery

Watch with original box and papers


45 Jewels, Automatic

Movement caliber

Power reserve

65 h

Case material


Case size

44 mm

Water resistance

100 ATM

Dial color



Sapphire Crystal


Rubber strap, Titanium Bracelet


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