German rose gold Astronomical pocket watch Circa 1790

Made by priest Hahne, one of the most eminent German watchmaker and natural scientist.
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A gentleman’s important astronomical German pocket watch until now an undocumented piece from the workshop of Hahn, circa 1790.
The transport case is brass. Inner case is rose gold, polished, tiered, large lateral hinge. Dial is enamel, two outer scales: month indication in French with red signs of the zodiac in combination with the numbers of the days of the month, indication for centre seconds in black Arabic numerals. Five auxiliary dials: hours, date, planetary days, the moon phases in combination with the time from moonrise to moonset; the last is divided into red and black quarters of the night and minutes, blued seconds pointer and gilt hands.
Full plate movement, firegilt, signed, seconds stop device, conical movement pillars, open barrel, florally pierced and engraved balance bridge with regulator scale, large five arm brass balance, horizontal cylinder escapement, facetted garnet endstone on balance.
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Diameter: 57 mm
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Weight: 102 g
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Signed: Gebrüder Hahn Hoffmechanici à Stuttgart