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:
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…
Recent Comments
Militado got this movement
Henry Archer Vesterhav. Mine is running at +2 sec/day. I do wish that the movement…
Step 1) Set the time correctly. Step 2) Wait 24 hours. Step 3) Compare the…
The wonderfully underrated Festina Automatic Skeleton (20632/1) also uses this movement. It keeps time better…
17 is the grout number. ST1701 is the specific automatic calibre and ST1700 the manual…
Duzu Watches of Western Australia use this movement in their DW-D3 diver range