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These pictures were found in Antiquarian Horology, Winter 1979, page 568.

Notice the striking similarity in the design of Ditisheim's marine chronometer and that of the Campiche. The dial diameter is 4.84 inches (12.3 cm), compared to the 7 inch diameter plates in the Campiche experimental model. The patent taken out in 1904 by Campiche is nearly identical in application to both Campiche's experimental models as well as Ditisheim's final production product.

It seems a curious design in that the balance wheel is of a massive size. The large inertia of the balance wheel would be very susceptible to derangement of its' regular oscillation in the environment of a tossing, turning ship. However, it appears that this chronometer was not intended for actual navigation, but as a master clock to drive the slave dials around a large ship, hence the provision for electrical contacts.

                                                                                  Ditisheim marine chrono2.jpg (128692 bytes) 

                                                                                        AHS winter 1979a.jpg (113026 bytes)


The example above is a second-generation test bed for the marine chronometer, serial number 2. It's height has been significantly reduced to match that which would fit within a standard box chronometer case. Notice the dome is the same as in the example illustrated, the later prototype was placed in the same dome as the first generation prototype which required the increased height. This example formerly in the William Scolnick collection and now residing in The Clockworks museum by James Nye, England.  

AHS winter 1979b.jpg (48230 bytes)  Ditisheim marine chrono.jpg (171526 bytes)

AHS winter 1979c.jpg (144120 bytes)  Ditisheim marine chrono1.jpg (322838 bytes)

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