German pocket watch with regulator dial and calendar Circa 1795

Silver gentleman’s pocket by Gebrüder Hahn
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An important German gentleman’s pocket watch with regulator dial, 24-hour indicator and calendar, circa 1795.
Silver case, polished, tiered, and glazed on both sides. Enamel dial with red Arabic hours on the left and black Arabic hours on the right; in the centre, four subsidiary chapter rings; auxiliary seconds, minutes, date and German weekdays, and blued and gilt hands. Full plate movement, fire gilt, signed, seconds stop device, concave movement pillars, open barrel, open work balance bridge with regulator scale decorated with floral engravings and birds, large seven-arm brass balance, horizontal cylinder escapement with steel cylinder and silver cylinder wheel, and facetted garnet endstone on balance.
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Diameter: 60 mm
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Weight: 126 g
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Signed: Gebrüder Hahn Hoffmechanici à Stuttgardt
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The watch was presented to Dr Oestmann in Bremen in March 2015; Dr Oestmann confirmed the authenticity of both the original case and movement. According to his expertise, this watch is the only one we know that is glazed on both sides.
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Gebrüder Hahn Hoffmechanici à Stuttgardt
The brothers Hahn, Christian Gottfried (* 1769) and Christoph Matthäus (1767-1833) worked in the workshop of their father Philipp Matthäus Hahn of Onstmettingen, Kornwestheim, and Echterdingen. Christian Gottfried and Christoph Matthäus went on to become “Hofmechanikus” (court mechanicians) in Stuttgart. Christian Gottfried was later recorded in Berlin and in America.