Original black silver print sigma dial. The dial has a very strong striking look with bright white subdials. However, some of the luminous dots have disintegrated and there are some marks in the subdials. The hands are original.

Extremely sharp case with wonderful edges. Probably only lightly detailed in the past, the case remains in excellent condition. The pushers, crown, MK1 bezel and domed crystal are all original to the watch.

Tight later heavy oyster bracelet reference 78350/571.

A great example of an early cosmograph.