A. Lange and Sohne Langematik Perpetual Calendar 18K YG
A. Lange & Sohne 310.021 Langematik Perpetual Calendar, 310021, 18k Yellow Gold on a Strap with an 18k Yellow Gold Deployant Buckle, Automatic Movement (Caliber L922.1), Day, Big Date, Month, Moon Phases, Leap Year, 24 Hour Indicator, Size: 38.5 mm, Thickness: 10mm, Display Back, Sapphire Crystal, Water Resistant to 3 atm, Like New with Original Winding Box and Papers.
More about Langematik Perpetual Calendar 18K YG
This is an 18K yellow gold A. Lange & Sohne Langematik Perpetual calendar 310.0210. It is the first self-winding wristwatch ever made with a perpetual calendar function, a double window outsize date, and a zero-reset mechanism that individually advances the calendar and moonphase displays, or with a single pressing of the push-bar on the side of the case at 10 o'clock. This self-winding timepiece has four subsidiary dials, one at 9 o'clock for the days of the week that includes a 24-hour day/night indicator, another at three o'clock for the month and within that is a leap year dial. The moonphase indicator is at 6 o'clock. The silver dial has 18K yellow gold alpha hands and applied Roman numerals. The leather strap also has an 18K gold buckle. It has a three-body, solid, brushed and polished case with a rounded bezel and a transparent sapphire case-back with 6 screws. The caliber L922.1 "Sax-O-Mat" movement has a Glasshute ¾ German silver plate with fausses cotes decoration, 43 jewels, a hand-engraved balance bridge, and a monometallic balance adjusted to 5 positions. There is a self-compensating flat balance spring, a shock absorber, and a straight-line lever escapement. It has a 21K gold, bi-directional micro-rotor with a platinum segment, a swan neck micrometer regulator, and the dial, case, and movement are all signed. It is an elegant 10mm thin, and it's also produced in platinum. Lange only included the perpetual calendar with the moonphase indicator in five important pocket watches between 1887 and 1931, with the dream being of an outsize date watch that was also perpetual. They presented the horological world with this incredible timepiece in the late 1990's. It has since been discontinued/upgraded with slight changes. This watch is a definitive example of how this first and still finest of German precision watchmakers set the standards in horology in 1845. Founder Adolph Lange would have never believed back in the middle of the 19th century that anyone outside the Royal Saxon Court could ever own something as diminutive, complex, and elegantly crafted as this wristwatch, which sports his name.
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