Early German silver open faced lever pocket watch Circa 1873

Silver lever by A. Lange & Söhne 
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A very early A. Lange & Söhne pocket watch from nobleman’s possession, delivered to Marenzeller Vienna, circa 1873. An original silver case with gold hinge, engraved crown and monogram AN on back, dome signed J. Marenzeller Vienna, matching numbers 8734 (Lange number) and 8410 (Marenzeller number) on case and movement, gold crown, early Lange movement with 2/3 main plate, balance bridge with hand-crafted engraving, early edition without fine adjusting device, early balance with gold screws, probably added unsigned enamel dial, blued steel hands, rare.
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Diameter: 47 mm
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Weight: 87 g
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Signed:  A. Lange & Söhne  Germany