Master Compressor Diving Chronograph

ref. 186T770

Professional divers' watch. One of the few chronographs which is water-resistant at 1,000 metres, case-back screw-mounted. Scale to calculate the heart rate per minute. Self-winding chronograph calibre with column wheel mechanism and vertical clutch. Steel notched unidirectional bezel designed for diving. Maximum visibility : luminescent operating indicator, hands, bezel triangle, digits and index. Patented compression keys, push pieces and rubber-moulded crowns.


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Pulsometer, Master Compressor Diving Chronograph

Pulsometer, Master Compressor Diving Chronograph

The dial surround features a graduated scale serving to measure the pulse rate per minute. All the user needs to do is activate the chronograph seconds hand, stop it after 30 heart-beats and then read off the figure on the scale to which the hand is pointing.
Patented push-pieces, Master Compressor Diving Chronograph

Patented push-pieces, Master Compressor Diving Chronograph

The push-pieces are equipped with the brand’s compression system. When in a closed position, they ensure optimal security by supercharging a toric gasket. To use the chronograph, the wearer simply makes a half-turn of the wing-nut in order to release the push-pieces ready for operation.

Technical details

Case material:
Articulated rubber
Jaeger-LeCoultre Calibre
  • 751D
  • Automatic
  • Number of pieces : 272
  • Vibrations per hour : 28800
  • Power-reserve : 65 Hours
  • Jewels : 41
  • Barrel : 2
  • Height : 5.65 mm
  • Hour - Minute
  • Date
  • Movement operating indicator
  • Chronograph
  • Hour counter
  • 30-minute counter
  • 60-second counter
  • Diving bezel
  • Pulsimeter
  • Titanium
  • Water resistance : 100 bar
  • Diameter : 44mm
  • Thickness : 16.3mm
  • Black, stamped and luminescent numerals and hour-markers
  • Articulated rubber
  • Satin

Jaeger-LeCoultre Calibre 751D