Chronograph Sommatore 5699 — Steel, Luminous Dial · TL Schmidt Engraved Caseback

Longines 13ZN-12

Central-minute configuration of the manually wound 13ZN family, with separate central elapsed-second and elapsed-minute hands plus a twelve-hour register. Specialist sources distinguish it from split-secondsSplit-seconds chronographA chronograph with two superimposed timing hands. One can be stopped to read an intermediate time while the other continues; releasing the stopped hand makes it catch up and run together with the other again. This allows comparison of events that start together. chronographsChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display. and state that it lacks flybackFlyback chronographA chronograph whose reset pusher can be pressed during timing to return the hands to zero. A new measurement begins when the pusher is released, without a separate stop operation.; the base 13ZN name alone does not establish this configuration.

Manual winding · 18,000 vph · 17 jewels