Longines Caliber L686.2

Brand	Longines
Caliber Number	L686.2
In-House?	No
Base Caliber	ETA 7754
Movement Type	Automatic, self-winding mechanical, chronograph
Lignes	13.25”’
Diameter	30mm
Height	7.9mm
Jewels	25
Power Reserve	46 hours
Beat Rate / Frequency	28,800 bph / 4Hz
Lift Angle	49 degrees
Shock System	Incabloc
Regulator	Etachron
Rotor	Ball bearing
Chronograph System	Cam style
Chronograph Layout	12-6-9
Hand Count	7
Features	Central hours; central minutes; central chronograph seconds; central GMT hand; small running seconds at 9:00; 30 minutes chronograph counter at 12:00;12 hour chrono counter at 6:00; date at 3:00
Hacking Seconds?	Yes
Country of Manufacture	Switzerland, Swiss made
Known Models	Longines Admiral Chronograph GMT (Ref: L3.670.4.76.6, L3.670.4.76.3), Longines GrandeVitesse, Longines Master Collection 44 Chronograph (Ref: L2.740.4.73.3) (Add your watches to the comments below…)

The Longines caliber L686.2 is an automatic chronograph watch movement found in various Longines chronograph GMT watches.

The L686 is basically an ETA calibre 7754 with a branded rotor. The 7754 is based on the popular ETA/Valjoux 7750, with a GMT complication for tracking a second time zone.

Additional Resources:

• More Longines mentions
• More calibers based off the 7754