{"product_id":"unworn-iwc-portofino-hand-wound-eight-days-stainless-steel-45mm-ref-iw510103-box-and-papers","title":"Unworn IWC Portofino Hand-Wound Eight Days, Stainless Steel, 45mm, Ref# IW510103, box and papers","description":"\u003cp\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eIntroducing the unworn IWC Portofino Hand Wound Eight Days 45mm, Ref# IW510103 a study in classical design paired with exceptional mechanical endurance. The polished stainless steel round case measures a balanced 45mm in diameter with a refined 12mm thickness, delivering strong presence while maintaining elegant proportions. Polished yellow gold–plated hands in an elegant leaf-shaped profile distinguish the silver dial for the hours and minutes. Matching applied index and Roman numeral hour markers reinforce the watch’s timeless character. A finely printed black track displays minutes, seconds, and fractions of seconds, with Arabic numerals marking each five-minute increment for precise legibility. The dial layout is thoughtfully organized: a small second’s sub-dial rests at 6 o’clock, the power reserve indicator at 9 o’clock, and a date window at 3 o’clock, creating visual symmetry and functional clarity. Protecting the display is an arched-edge sapphire crystal with anti-reflective coating on both sides. The fixed polished stainless steel bezel frames the dial with understated refinement. At its core lies the hand-wound IWC Caliber 59210, operating at 28,800 vibrations per hour and constructed with 30 jewels. The movement delivers an impressive eight-day power reserve. Notably, while mechanically capable of running up to nine days, the mechanism is intentionally stopped before the mainspring’s torque diminishes, ensuring consistent timekeeping performance throughout its full operational span. The beautifully finished movement can be admired through the transparent case back. Completing the timepiece is a brown alligator leather strap by Santoni, secured with a stainless steel tang buckle. With water resistance rated to 30 meters (99 feet), this Portofino embodies enduring craftsmanship, balanced aesthetics, and remarkable mechanical autonomy.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"margin-top: 0cm;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan style=\"font-family: 'Georgia',serif;\"\u003eMake: IWC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eModel: Portofino Hand Wound Eight Days\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cspan style=\"font-family: 'Georgia',serif;\"\u003eReference: IW510103\u003c\/span\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cspan style=\"font-family: 'Georgia',serif;\"\u003eDiameter: \u003c\/span\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003e45mm\u003c\/span\u003e\u003cspan style=\"font-family: 'Georgia',serif;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eCase material: Polished Stainless Steel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eDial color: Silver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eBezel Type: Fixed \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eBezel Color: Silver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eBezel Material: Polished Stainless Steel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eCrystal: Scratch-resistant sapphire\u003c\/span\u003e\u003cspan lang=\"EN-US\" style=\"mso-ansi-language: EN-US;\"\u003e \u003c\/span\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003econvex, antireflective coating on both sides\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eMovement: Manual-wind movement\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eBracelet Type: Strap \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eBracelet Material: Brown alligator leather by Santoni\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eClasp: Stainless Steel Tang Buckle\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eFunctions: Date, Central Hour and Minute, Power reserve indicator, Small hacking second’s sub-dial\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"margin-bottom: .0001pt; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eWater resistance: Up to a 30m\/99ft (3ATM)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eWarranty: Balance of IWC 2 years International Warranty\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: .0001pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Georgia',serif; mso-ansi-language: EN-US;\"\u003eThe watch is unworn and comes complete with full set of original accessories, such as watch box, warranty card dated recently, booklets and manuals.\u003c\/span\u003e\u003c\/p\u003e","brand":"IWC","offers":[{"title":"Unworn \/ 2025","offer_id":48071447085288,"sku":"IW510103","price":8990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/0043\/2053\/files\/5875e2b6949e6517eee61e309b26b52d7edff995.jpg?v=1771588955","url":"https:\/\/www.affordableswisswatchesinc.com\/products\/unworn-iwc-portofino-hand-wound-eight-days-stainless-steel-45mm-ref-iw510103-box-and-papers","provider":"Affordable Swiss Watches Inc.","version":"1.0","type":"link"}