German deck chronometer with 56h power reserve Circa 1890

Deck chonometer by Hermann Diedrich
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A rare German ship’s chronometer with 56h power reserve and Kullberg’s secondary error compensation balance, circa 1890. The watch is housed in a beautiful mahogany deck box. It features a silver-plated dial with Roman radial hours, an outer minutes track, a subsidiary dial for the seconds, a power reserve indicator, and classic spade hands. The brass movement, ebauche crafted by Victor Kullberg, includes a chain/fusee and spring detent escapement, as per the design by Thomas Earnshaw.
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Dimensions box:180 x 180 x 195 mm
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Signed: Hermann Diedrich, Geestemünde
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It is worth noting that the chronometer balance of this ship is equipped with secondary error compensation based on Kullberg’s method. Additionally, the chronometer case is richly decorated with brass, which indicates the high standards that Hermann Diedrich set for his work.
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Hermann Diedrich was a German chronometer and watchmaker who was born around 1885. He was the son of Karl Johannes Diedrich, who was born around 1864 and completed his apprenticeship at the DUS. Karl Johannes lived in Geestemünde (Bremerhaven) at Borriesstrasse 24. Both father and son were chronometer manufacturers who submitted their instruments to chronometer tests. For the winter of 1894/95, four of Hermann Diedrich’s instruments were recorded in the 18th test of the German Maritime Observatory in Hamburg, which passed successfully alongside such famous names as Bröcking and Adolph Kittel.