VINTAGE La SIRENE 42MM OPEN FACE CHRONOGRAPH REGISTER SWISS POCKET WATCH MOVEMENT. ORIGINAL ENAMEL PORCELIAN DIAL WITH SHORT LINE UNDER CENTER HOLE. THE SWEEP SECOND HAND IS PROVIDED TO FIT THE THE PIVOT OF THE SWEEP WHEEL, THE SWEEP WHEEL PIVOT IS GOOD. MARKED ON MOVEMENT PAT. THE BALANCE STAFF IS GOOD AND MOVEMENT IS…