Jaeger-LeCoultre Master Compressor Diving Chronograph GMT Navy SEALs

[ via JLC ]

This is an authentically technical, demanding and rare diving instrument. Rare because very few watches combine chronograph functions and a dual time-zone display with day/night indication – especially within the context of a diver’s watch that strictly complies with the stringent NIHS (norms relating to its anti-magnetic, photoluminescent, water- and shock-resistance properties). Indeed, these standards are even surpassed by the Master Compressor Diving Chronograph GMT Navy SEALs, which is watertight to a depth of 100 metres, whereas the NIHS calls for “just” 100 metres. 

This 1000-metre performance is achieved by the limited series of 1500 in grade 5 titanium of the Master Compressor Diving Chronograph GMT Navy SEALs, while the 18-carat pink gold version in a limited edition amounts to 300 metres – an impressive record for this precious metal. 

A new mechanical automatic movement, Jaeger-LeCoultre Calibre 757, powers this demanding 46.3 mm-diameter instrument complete with a steel-frame ceramic diving bezel, compression key crown and pushpieces equipped with compression wing-nuts and mastermoulded in black rubber; as well as a cambered sapphire crystal (hardness no. 9) and screw-down case-back engraved with the Navy SEALs emblem. 

The functions are arranged in a powerful, ultra-legible manner on its black dial stamped with luminescent numerals and hour-markers. Two trapeze-shaped skeletonized and luminescent hands point to the hours and minutes. The chrono-graph functions are indicated by two central hour and seconds hands along with a 30-minute counter, while the dial also shows the date, a movement operating indicator on a luminescent black and white disc, as well as a 12-hour dual timezone display with complementary day/night indication. 

Movement: 

mechanical automatic JLC Calibre 757, crafted, assembled and decorated by hand 

28,800 vibrations per hour 

65-hour power reserve 

285 parts 

41 jewels 

5.65 mm thick 

Functions: 

hours, minutes, date 

chronograph, 30-minute counter, central seconds hand 

movement operating indicator 

second time zone with day/night indication 

Dial: 

black, with stamped, luminescent hour-markers and numerals 

date: white, transferred against a black background 

movement operating indicator: black and white luminescent disc 

Hands: 

hours and minutes: trapeze-shaped, openworked, luminescent 

others: steel or brass, rhodium-plated or white 

Crown: 

1 black rubber-moulded crown at 3 o’clock equipped with a compression key, for starting the watch, adjusting the hours, minutes and date, as well as adjusting the second time zone 

2 black rubber-moulded pushpieces at 2 and 4 o’clock equipped with compress wing-nuts, for the chronograph functions 

Case: 

Ø 46.3 mm in grade 5 titanium, or in 18-carat pink gold, with ceramic diving bezel (steel frame) 

Navy SEALs engraving on the case-back 

cambered sapphire crystal, hardness n° 9 

screw-down case-back 

water-resistant to 100 atm for the grade 5 titanium version and to 30 atm for the 18-carat pink gold version. 

Wristbands : 

Vintage leather, overmoulded rubber or articulated rubber. The watch also comes with an alternative wristband, a diving strap in black Cordura® with a rip-and-grip strip. 

References: 

Pink gold, limited series of 500 

on leather strap: Q1782470 

on articulated rubber wristband: Q178277 

on rubber-moulded wristband: Q1782670 

Grade 5 titanium, limited series of 1500 

on leather strap: Q178T470 

on articulated rubber wristband: Q178T677 

on rubber-moulded wristband: Q178T670 

on titanium bracelet: Q178T170