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Edward Korfhage and Son, Buer, Germany, c. 1940.

Three train with hour and quarter 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. 41"w x 27"h x 26"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. Frame includes cabriole legs, a style favored by several manufacturers in the United States, but quite uncommon in Europe.

Planetary maintaining power is the most reliable system for this purpose. It also provides reduction for heavy weights. The planetary gear system used for maintaining power in this clock uses an additional spur gear. This gear is slightly smaller and mounted on the same arbor in front of the main barrel's ring gear that has internally cut teeth. When winding, the spur gear counter-rotates in the direction of the ring gear, providing a fascinating visual experience. In typical planetary maintaining power systems this gearing is unseen at the rear of the barrel and the spur is not present. Planetary maintaining power was not often used as this was more expensive than alternative systems. Compare with Potts planetary system.

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

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