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Edward Korfhage and Son, Buer, Germany, 1952.

Two train with hour count wheel strike. Combined cast iron flat bed with plate and spacer construction. Graham deadbeat escapement with adjustable pallets. Planet and ring gear maintaining power. Movement is equipped with a one minute period, differential type gravity train remontoire. Electric and manual winding. 16"w x 16"h x 16"d.

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Based strictly on an engineering level, this is one of the better made clocks I've seen. The Vulliami style bushings have very long journals. The fit, finish and gauge of the wheel works are finely executed. It is the smallest version of two train model made by this company.  This movement was originally installed in a school in Denmark. After a period of only four years it was replaced by an electronic system. It then went to the provincial museum of Schleswig-Holstein, Germany. The museum dissolved ten years ago. A medium sized, manually wound, three train version can be seen here.

Planetary maintaining power is the most reliable system for this purpose. It also provides gear reduction for heavy weights and is particularly useful in electric wind situations to reduce stress on the motor drive. Since the electric winding may occur during a strike sequence, the planetary gear system used for maintaining power in the time train is also used in the strike train. Compare with Potts planetary system.

The Korfhage company is still in business today and is a large machine tool manufacturer.

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