Longines Caliber L687 5

Longines Caliber L687

Longines Caliber L687 5

Brand Longines
Caliber Number L687
In-House?
No
Base Caliber
ETA A08.L91 (ETA/Valjoux 7751)
Movement Type Automatic, self-winding mechanical
Lignes 13.25”’
Diameter
30mm
Height
7.9mm
Jewel Count
25
Beat Rate
28,800 vph, 4 Hz
Lift Angle
Unconfirmed
Power Reserve
54 – 66 hours (depends on variation)
Rotor Style
Ball-bearing
Hand-Windable?
Yes
Anti-Shock Device
Nivachoc or Incabloc
Chronograph System
Column wheel
Vertical Clutch?
No
Silicon Balance Spring?
Depends on variation
Regulator
Depends on variation
Hand Count 8
Functions Central hours; central minutes; central chronograph seconds; small running seconds at 9:00; 24 hour indicator hand at 9:00; 30 minutes chronograph counter at 12:00; 12 hours chrono counter at 6:00; central pointer date hand; day of the week at 12:00; month at 12:00
Hacking Seconds?
Yes
Country of Manufacture Switzerland, Swiss made
Known Models
Longines Master Collection Moonphase Chronograph (Add your watch to the comments below…)

The Longines caliber L687 is a triple-date moonphase movement found in the Longines Master Collection.

L687.2 VS L687.5:

There is a notable evolution in the calibre L687 with some important differences.

  • L687.2 – Regular balance spring, ETACHRON regulator, Incabloc or Nivachoc anti-shock, 54 hours power reserve
  • L687.5 – Silicon balance spring, free-sprung balance wheel, Nivachoc anti-shock, 66 hours power reserve

At the time of this caliber listing, the current variation is the L687.5 as seen in the image at the top of the page.

Functionality:

Longines L687 L678 Functions Instruction Manual

Setting the Calendar:

Longines warns against setting the calendar (including the moonphase) when the hands are between the hours of 7PM and 6AM.

Avoid this zone when setting your watch, otherwise you can damage the movement – even if it still runs, it could have unwanted results such as causing the day/date to flip at a different time than 12AM.

Additional Resources:

  • Check back

Note: This caliber listing is still being updated, but feel free to start discussions on it in the comments below…

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