A. Lange & Sohne The LANGE 31

MOVEMENT: Lange manufacture caliber L034.1, manually wound, crafted to the highest Lange quality standards and largely assembled and decorated by hand; precision-adjusted in five positions; twin mainspring barrels; plates and bridges made of untreated German silver; balance cock engraved by hand. 406 parts. 61 jewels including 1 transparent sapphire jewel. Lever escapement. Shock-resistant glucydur screw balance, Nivarox hairspring balance with a frequency of 21,600 semi-oscillations per hour, whiplash precision index adjuster with patented beat adjustment mechanism. Power reserve of 31 days. FUNCTIONS: Time display in hours, minutes, small seconds, with stop seconds, outsize date, power-reserve indicator. Winding key with torque limiter, crown for setting the time, push piece for advancing the date display. CASE: Diameter 46 mm, platinum. CRYSTAL: Sapphire crystal (hardness 9). DIAL: Solid silver, rhodié, rhodiumed gold hands. STRAP: Hand-stitched crocodile strap with precious-metal Lange prong buckle in solid platinum.

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