A. Lange and Sohne 252.025 Richard Lange JUMPING SECONDS Platinum Limited (28545)

28545 A. Lange & Sohne 252.025 Richard Lange Jumping Seconds Platinum 252025, Limited to 100 pieces, platinum case on a strap with an platinum tang buckle, manual wind A. Lange & Sohne caliber L094.1, 42 hour power reserve with a low power indicator where the circles intersect, rhodium dial with regulator display, white gold hands, black Roman numerals and red minute markers, large blued steel jumping seconds hand, sapphire crystal, display back, diameter: 39.9mm, thickness: 10.9mm, Like new with original box and papers dated April 2017

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More about A. Lange and Sohne 252.025 Richard Lange JUMPING SECONDS Platinum Limited

This is a platinum A. Lange & Sohne Richard Lange Jumping Seconds Platinum 252.025. It has an alligator leather strap with an A. Lange & Sohne platinum tang buckle, and a scratch resistant sapphire crystal. It has a pull out winding crown that activates the zero-reset function with a multi-disc clutch, allowing the instant accurate synchronization; the seconds hand jumps to zero when the crown is pulled. It has an exhibition sapphire display case back secured with 6 screws, and engraved around the perimeter with "A. LANGE & SOHNE – GLASHUTTE/SA," the edition number of 100, a serial number, and 4 hallmarks. The 40mm diameter solid three-body case, curved lugs, and angled cupped bezel are all polished. The dial is solid silver with rhodium cladding. There are three intersecting blue-rimmed circles with a red triangle low power indicator where they meet that reminds the wearer to rewind. The large center circle at 12 o'clock measures the minutes with a blued needle hand with a skeletonized diamond-shaped counter balance. The offset circle at 8 o'clock has painted black Roman numeral hour markers, square black indices, and a white gold sword hand. The twin circle at 5 o'clock has a running small seconds scale with red numerals at the quarter minutes, and a white gold sword hand. There is a 42-hour power reserve at full wind, and the 10.9mm thick case, dial, and movement are all signed.

This A. Lange & Sohne Richard Lange Jumping Seconds Platinum 252.025 has a mechanical manual winding A. Lange & Sohne caliber L094.movement. The plates and bridges are rhodium plated and made of untreated German silver, with a hand-engraved balance cock, and with Cotes de Geneve (Glashutte ribbing) embellishment. It's constructed with 50 jewels (including a black-polished cap for the escape wheel jewel), 390 components, 8 screwed gold chatons, blued screws, and a lateral lever escapement. It includes a two wheel trains that allows constant-force generation and the seconds jump to interact, and a precision beat-adjustment system with a lateral setscrew and a whiplash spring. There is a Glucydur balance with screws adjusted to 5 positions, a swan neck regulator, and the mechanism oscillates at a frequency of 21,600 vph (3 Hz).

The A. Lange & Sohne 252.025 was introduced at the SIHH exhibition in 2016 in an edition of 100 examples. Ferdinand Adolph Lange first invented a one-second movement with a jumping hand in 1867, and the patent was granted by the newly founded Imperial Patent Office ten years later.