Longines L678

The L678 is an automatic chronograph movement with a moonphase display, manufactured by Longines and based on the ETA/Valjoux 7751. Introduced in 2005, it powers various Longines Admiral and HydroConquest models featuring the classic chronograph layout with 12-hour and 30-minute counters alongside the moonphase aperture. The movement is not produced in-house by Longines but relies on the established Valjoux architecture known for robustness. Production of the L678 has been discontinued.