The Cortebert 677 is a manual-winding movement introduced in 1886. It measures 12 lignes in diameter and features 15 jewels with no shock protection. The open-face calibre model 5 includes a bimetallic screw balance, Breguet hairspring, and sub-second display, notable for its negative stem mechanism with rocker bar and ratchet positioned under the base plate. Production continued until approximately 1894.
Movement Type
Manual Winding
Jewel Count
15 jewels
Display Type
Analog