https://www.davidgardnersjewelers.com/movement/manufacture-calibre-mt5813-cosc-with-chronograph-function-self-winding-mechanical-chronograph-movement-with-bidirectional-rotor-system/
Manufacture Calibre MT5813 (COSC) with chronograph function Self-winding mechanical chronograph...
with chronographself windingmanufacturecalibrecosc