IWC Portofino 8 Days IW510103 Watch


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IWC Portofino 8 Days Power Reserve 45mm Silver Dial Mens Watch IW510103. Manual-winding movement. Stainless steel case 45 mm in diameter. Exhibition sapphire crystal case back. Stainless steel bezel. Scratch resistant sapphire crystal. Silver dial with steel baton hour markers and roman numeral at 12. Leaf shaped hands. Minute markers around the outer rim. Date window at the 3 o'clock. Small seconds sub-dial at the 9 o'clock. Power reserve indicator at the 9 o'clock. Santoni for IWC brown alligator strap with orange lining and stainless steel tang buckle.

In the Portofino Hand-Wound Eight Days, the IWC-manufactured 59210-calibre movement will run precisely and reliably for a full 192 hours, or 8 days, before it automatically stops. Strictly speaking, it is 9 days, but the extra day in reserve ensures that the movement maintains as constant a driving torque as possible and continues to run precisely. The owner will always be on the safe side if he winds his watch once a week. The power remaining can be read off on the power reserve display on the dial. Together with the small seconds display and date display, this gives the dial a pleasing equilibrium. The indexless balance has a frequency of 28,800 beats per hour and, together with the Breguet spring bent into shape in accordance with age-old watchmaking tradition, helps to make the watch exceptionally accurate. The watch is available with a stainless-steel case, silver-plated dial and solid gold indices. It has a transparent sapphire-glass back and a brown alligator leather strap from the House of Santoni.

This watch has some minor scratches and marks which are shown in the photos, but overall this is a clean looking watch. Comes with a IWC box + IWC Polishing Cloth, NO Papers, Guaranteed 100% Authentic.


  • Model: IWC Portofino 8 Days
  • Reference: IW510103
  • Functions: Hours, minutes, seconds, date, power reserve
  • Material: Stainless steel
  • Dimensions: 45mm diameter; 11.7mm height
  • Caseback: Sapphire Crystal
  • Dial: Cream
  • Caliber: 59210 Calibre, IWC-manufactured movement, Manual-winding
  • Power reserve: 192 Hours (8 Days)
  • Water resistance: 3 Bar
  • Bracelet/strap: Dark brown alligator leather strap by Santoni
  • Lug width: 22mm
  • Manufactured: Switzerland


History of IWC

AG, doing business as IWC Schaffhausen, is a luxury Swiss watch manufacturer located in Schaffhausen, Switzerland. Founded by American watchmaker Florentine Ariosto Jones in 1868, IWC has been a subsidiary of the Swiss Richemont Group since 2000.