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Arnold & Son - HM Perpetual Moon, Steel Case, Blue Guilloché Dial Technical details Reference: 1GLAS.U02A.C122S, stainless steel case, blue guilloché dial Movement: ? Calibre: A&S1512, Exclusive Arnold & Son mechanical movement ? Hand-wound ? Big perpetual moon ? 27 jewels ? Diameter 34 mm, thickness 5.35 mm ? Power reserve 90 h, two barrels ? 21'600 vibrations/h ? Movement decoration: nickel-silver movement, rhodium treated with Haute Horlogerie finishing: manually chamfered bridges with polished edges, fine circular graining and Côtes de Gen?ve rayonnantes, blued screws with polished and chamfered edges Functions: ? Hours, minutes, big perpetual moon, diameter disc: 29 mm, diameter moon: 11.2 mm, second moon-phase indication on the back for setting purposes Dials: ? Translucent blue lacquered guilloché, translucent blue lacquered guilloche moon disc with silvered moon and stars; back dial: fine circular graining, rhodium treated, rendition of the 8 phases of the moon Case: ? Stainless steel ? Diameter 42 mm ? Cambered sapphire with anti-reflective coating on both sides, case back see-through sapphire ? Water-resistant to 30 m Strap: ? Hand-stitched black or brown alligator leather Arnold & Son - HM Perpetual Moon, Steel Case, Blue Guilloché Dial Swiss luxury watch maker Arnold & Son unveils a new version the HM Perpetual Moon with a steel case and a blue guilloché dial. The HM Perpetual Moon is a testament to Arnold & Son?s tradition of watches with astronomical indications. The HM Perpetual Moon, with one of the biggest moon-phase apertures on the market, is part of the Arnold & Son Royal Collection. The Royal Collection is inspired by the timepieces created in the early part of John Arnold?s life, and pays tribute to the watches he produced for King George III and members of the royal court. The timepieces in the Royal Collection demonstrate the brand?s prowess in traditional watchmaking and classical decorative arts. The sophisticated HM Perpetual Moon is, indeed, a superb example of Arnold & Son?s technical and artistic excellence. From the inside out, this new timepiece ? with rich blue guilloché moon disc and engraved moon ? surprises and delights. It houses the exclusive Arnold & Son mechanical hand-wound movement, the calibre A&S1512. This calibre was especially developed for this model with the objective of offering a uniquely precise, big and three-dimensional moon-phase. The calibre is also equipped with a double barrel to yield 90 hours of power reserve. The HM Perpetual Moon offers one of the most accurate moon phases on the market, with only one day?s deviation every 122 years ? at which point a single push on the corrector will keep it in sync for another 122 years. The exceptional perpetual moon-phase indication of this watch is a marvel in many ways. From the aesthetic side, the 29 mm moon-phase disc, which runs from 10 to 2 o?clock on the dial, reveals one of the largest moons on the market ? with a diameter of 11.2 mm for the moon alone. Additionally, this large moon is one of the most visually stunning recreations of the moon because it is a three-dimensional sculptured moon that was first hand-engraved and then duplicated for the series. The sculptured moon is then inserted into the guilloché disc. From the technical side, in addition to the HM Perpetual Moon being so precise, it is also an intriguing complication in that it is not simply a module added to the movement, but, in fact, is fully integrated into the calibre. The watch also has a unique easy-to-set feature thanks to the ingenious addition of a second moon indication installed at the back of the movement. This second moon display, visible via a transparent case back, features a graduated dial and a pointer hand that allows for a more exact setting. The multiple technological advancements in the calibre make this timepiece truly outstanding. To further underscore that, the entire rhodium treated nickel-silver movement features hand finishing indicative of the finest Haute Horlogerie timepieces, including manually chamfered bridges with polished edges, Côtes de Gen?ve rayonnantes and fine circular graining, circular grained wheels, and blued screws with polished and chamfered edges. The timepiece naturally features an antireflective sapphire crystal and case back to view the meticulous details. The HM Perpetual moon measures 42 mm in diameter in its classically elegant stainless steel case. Viewed from the side, the housing is stepped and tapers from top to bottom, the widest section accommodating the extra-large glass with the lower part narrowing to fit snugly on the wrist. Each is finished with an exquisite hand-stitched alligator strap. zdroj - http://www.masterhorologer.com/2015/12/arnold-son-hm-perpetual-moon-steel-case.html?utm_source=BP_recent