IWC IW510203 Portuguese Hand Wound Eight Days SS / Silver Dial (28601)

28601 IWC 5102 Portuguese Hand Wound Eight Days IW510203 5102-03, stainless steel on a strap with a stainless steel deployment buckle, manual wind 8 day IWC caliber 59215, date at 3 o'clock, small seconds with blued steel hand at 6 o'clock, silver dial with applied silver Arabic numerals, sapphire crystal, display back, water resistant, diameter: 43mm, thickness: 14mm, Like New with Box and Papers; dated 6/2016

$7,450

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More about IWC IW510203 Portuguese Hand Wound Eight Days SS / Silver Dial

This is a stainless steel IWC Portuguese Hand Wound Eight Days, IW510203. It has a black alligator leather strap made by Santoni, with a matching stainless deployment buckle, and a scratch resistant sapphire crystal with an arched edge and antireflective coating on both surfaces. The 43mm diameter solid three-body case, stepped bezel, and downturned lugs are polished. It has a skeleton sapphire crystal screwed down display case back and a push/pull-winding crown. The dial is silver with applied silver Arabic numeral and dot hour index markers, a silver printed minute track, and feuille leaf shaped silver toned polished hour & minute hands. There is a subsidiary small seconds dial with a very fine concentric circle texture at the 6 o'clock position, and a date aperture window at 3 o'clock. It's water resistant to 30 meters/100 feet, and the power reserve is a full eight days/192 hours at full wind. The 14mm thick case, dial, and movement are all signed.

The manual winding IWC caliber 59215 movement is rhodium plated with fausses cotes embellishment. It's constructed with 30 jewels and a shock absorber mechanism. It has a straight-line lever escapement, a monometallic balance that's adjusted to 5 positions, and a self-compensating Breguet balance spring. There is an index regulator, and a skeletonized bidirectional rotor with an engraved IWC logo with "adj to 5 positions," and a poser reserve display on the back.

IWC debuted their Portuguese 59000 caliber watches in 2013. The actual power reserve is a full 9 days, but a blocking mechanism restricts it to the first 192 hours, when the tension in the mainspring remains is at its most regular. This watch honors the design of the original Portuguese timepieces of the 1930s with an arched-edge crystal, a railway-track-style chapter ring, feuille hands, and a small seconds dial at 6 o’clock. To keep the traditional symmetry of the dial, the power reserve display was positioned on the movement side.