German gold engine turned lever pocket watch Circa 1860

Gold lever watch with diamond endstone
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Lange-rarity, very early, heavy A.Lange Dresden gold hunting cased watch , 1A quality, early famous Lange watch in 1A quality, circa 1860.
An 18 carat gold, American hunting cased, prime quality, matching numbers on the movement, all three lids gold, early 2/3 plate movement in 1A quality with diamond endstone and screwed gold chatons, golden lever, and gold escapement wheel, plate signed A. Lange Dresden, very well preserved condition, original enamel dial, Roman numerals, also signed, blued steel hands, very nice condition, rarity. According to our research, this is the earliest known Lange gold hunting cased watch in 1A quality. The watch comes with box and extract of archives.
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Diameter: 54.5 mm
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Weight: 138 g
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Signed:  A. Lange  Dresden