Arnold & Son 1L2AS.S02A.K01B Longitude II SS / Silver Dial (25235)

25235 Arnold & Son TBR True Beat 1L2AS.S02A.K01B, 1L2ASS02AK01B, Stainless Steel Case on a Leather strap with a Stainless Steel Tang Buckle(It also comes with a rubber strap), Automatic, hours, minutes, sweep seconds; date; 24-hour display/sun compass; numeral ring for current longitude; hinged case back with indication for equation of time, Light Silver Dial, Sapphire Crystal, hinged case Back, Water Resistant, Size: 44mm, Thickness: 16.5mm, Like New with Original Box and papers.

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More about Arnold & Son 1L2AS.S02A.K01B Longitude II SS / Silver Dial

This is a stainless steel Arnold & Son Longitude II TBR True Beat 1L2AS.S02A.K01B. It has a leather strap with a stainless steel tang buckle (It also comes with a rubber strap), and a scratch resistant sapphire crystal. It has a solid hinged case back engraved with a high relief sunray pattern and "ARNOLD & SON – COSC." The interior of the case back has engraved charts and a rotating arm for calculating equation of time corrections. It has a screw-down crown at 2 o'clock for rotating the inner degrees of the longitude scale, a crown at 4 o'clock for hand and date setting, and a button at 3 o'clock for releasing the back hinge. The left side case band has an engraved "LONGITUDE." The 44mm diameter solid three-body case, downturned lapidated lugs, and flat coin edge bezel are polished/brushed. It has a silver dial with a central map of the North Pole and a sun compass surrounded by a rotating 24-hour scale with day/night indicator, "coffin-shaped" luminous applied hour markers and a minute/second scale on a brushed silver reserve, and epee hands with luminous inserts. The hour hand has a red needle tip that's extended to the degree scale, and there is a center sweep seconds hand. The painted outer silver scale has East-/+West degrees, and the inclined rotating perimeter degree scale shows the longitude with luminous 12-hour Arabic numerals. There is a round date aperture window at 6 o'clock underneath an internal Cyclops magnifying lens, and it's water resistant to 50 meters/160 feet. It has a 42-hour power reserve at full wind, and a Certified Official Superlative Chronometer (COSC) rating. The 16mm thick case, dial, and movement are all signed.

This Arnold & Son Longitude II TBR True Beat 1L2AS.S02A.K01B has a mechanical automatic self-winding Arnold & Son caliber A 1850 movement. It's rhodium-plated with fausses cotes embellishment, and it's constructed with 25 jewels, a shock absorber device, a straight-line lever escapement, and a monometallic balance. It includes a self-compensating flat balance spring, a micrometer regulator, and the mechanism oscillates at a frequency of 28,800 vph (4Hz).