Zenith 4003

Zenith 4003 is a manufacture movement by Zenith.

Automatic chronograph with perpetual calendar and moon phase. Bi-directional winding ball-bearing rotor. Further development of the calibre Zenith 410 (El Primero).

Used e.g. with the model Zenith Grande Chronomaster XXT Quantième Perpétuel.

Description: Self-winding movement, bi-directional winding Escapement: Stone lever Yoke winding system Ball-bearing central rotor in 21ct rose gold or white gold Chronometer certificate (COSC) Column wheel calibre Shock protection Kif-Ultraflex 321 components Functions: Chronograph Small seconds Perpetual calendar and moon phase Data: 13¼ lignes D 30.0 mm, H 8.1 mm 31 jewels 36,000 A/h Power reserve > 50h Production period: Since 2005