IWC Big Pilot Perpetual Calendar Bronze Limited 250 IW503601 UNWORN

More about Big Pilot Perpetual Calendar Bronze Limited 250 IW503601 UNWORN

This is an 18K rose gold IWC Portuguese Perpetual Calendar Double Moon IW503601. It includes a leather strap with a bronze tang buckle and scratch resistant sapphire crystals with anti-reflective coating. It has a signed gem-shaped pull-out winding crown and a screw down exhibition sapphire display crystal case back engraved with "6 BAR," and a serial number. The solid 46mm diameter three-body case, curved lugs, and stepped angled bezel, are satin/brushed. The dial is military green with luminous gold "Spitfire" hour and minute hands and applied luminous white Arabic numeral hour markers. There is a perimeter white minute scale with rectangular hour markers (yellow at the quarter hours) and an aviation triangle is at 12 o'clock. It has four round green recessed subsidiary dials with luminous white Arabic numerals, markers, and gold indicator hands, including a combination running constant small seconds and the day of the week register with a red arrow pointer at 9 o'clock , a radial month register with a red arrow tipped indicator at 6 o'clock, and a gold Northern and Southern hemisphere moon phase display at the 12 o'clock position braced with tiny white Spitfire symbol marked "N" and "S." There is a 7-day power reserve indicator with a radial date dial at 3 o'clock, and an aperture window for the 4-digit year is between 7 and 8 o'clock. It's water resistant to 60 meters/100 feet, and it has a power reserve of 7 days at full wind. The 16mm thick case, dial, and movement are all signed. This IWC Portuguese Perpetual Calendar Double Moon IW503601 has a mechanical automatic self-winding IWC caliber 51614 movement that's rhodium plated with fausses cotes embellishment. It's constructed with 62 jewels, a shock absorber mechanism, and a straight-line lever escapement. It has a monometallic balance that's adjusted to 5 positions, a self-compensating Breguet balance spring, and a micrometer regulator. The skeletonized rotor contains the gold medallion inlay engraved "IWC - Probus Scafusia." The mechanism oscillates at a frequency of 28,800 vph (4 Hz). The IWC Portuguese Perpetual Calendar Double Moon IW503601 debuted in 2019 in a limited edition of 250 examples. Its moon phase calendar will only require a correction of 1 day after 577.5 years.

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