German gold doctor’s watch with jumping seconds Circa 1905

Gold lever watch in original box
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A Glashütte doctor’s watch with independent stoppable jumping seconds mechanism seconde morte, circa 1905.
Is sold on November 4, 1905 for 543 marks to E. Pröhl company in Halle – with original box, Lange & Söhne operating instructions, original certificate and Lange extract from the archives. 
An 18 carat pink gold, engine turned, monogrammed, case design “Lucia”, gold dome, enamel dial, Arabic Empire numerals, auxiliary seconds, gold Louis XV hands,  3/4 plate movement, frosted, gilt, signed, applied seconde morte-mechanism, gold screw compensation balance, hand engraved balance cock, index spring fine adjusting device, gold lever and escape wheel.
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Diameter: 53 mm
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Weight: 113 g
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Signed: A. Lange & Söhne Glashütte B/Dresden