German rose gold quality 1A lever pocket watch Circa 1904

Rose gold full hunter by A. Lange & Söhne
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An extremely rare 18 carat rose gold hunting cased quality 1A Glashütte lever pocket watch, circa 1904. Sold in 1904 for 607 marks. Glazed ¾ plate movement, a piston tooth lever escapement and gold screw compensation balance. White enamel dial with Arabic hours, an outer minute track, sunk subsidiary seconds at 6 o’clock and gold Louis XIV hands. A plain case with the engraved monogram CP on the front. Dial signed, case and movement signed and numbered, movement and case with matching numbers.
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Diameter: 51 mm
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Weight: 102 g
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Signed: A. Lange & Söhne Glashütte B/Dresden
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According to Martin Huber’s Long List, this watch was subjected to a special rate test at the Leipzig Observatory and the German Maritime Observatory in Hamburg. It comes from a series of around 1000 watches tested at the Leipzig Observatory between 1883 and 1905, but only around half of them are marked as ‘tested’ in the workbooks.