IWC Portofino IW391406

Model #: IW391406 IWC Portofino Chronograph 39mm Mens Watch

• Case: stainless steel - polished • Dial: silver - matte • Markers: applied • Seconds hand: sub-dial at 6 o'clock • Calibre: IWC calibre 79350, beats at 4Hz/28800 vph, 31 jewels, power reserve of 44 hours (2 days) Condition : New/Unworn Case Shape : Round Case Dimensions : 39mm Case Thickness : 12.7mm Case Material : Stainless Steel Dial Color : Silver Crystal : Scratch Resistant Sapphire Screw-in Crown : No Water Resistance No ratingDoes not allow contact with water 30m/99ft - 50m/165ftAllows for contact with water such as washing hands and rain 50m/165ft - 100m/330ftAllows for light poolside swimming 100m/330ft - 200m/660ftAllows for swimming, snorkeling and showering (do not expose to hot water) 200m/660ft - 500m/1650ftAllows for impact water sports such as board diving and scuba diving 500m/1650ft +Appropriate for serious deep water diving. Learn more about Water Resistance. Close : 30m/3atm/99ft No rating : Does not allow contact with water 30m/99ft - 50m/165ft : Allows for contact with water such as washing hands and rain 50m/165ft - 100m/330ft : Allows for light poolside swimming 100m/330ft - 200m/660ft : Allows for swimming, snorkeling and showering (do not expose to hot water) 200m/660ft - 500m/1650ft : Allows for impact water sports such as board diving and scuba diving 500m/1650ft : Appropriate for serious deep water diving Case Back : Solid Band Material : Alligator/Crocodile Leather Color/Finish : Black Clasp : Tang Buckle Lug Width : 20mm Movement : Automatic An automatic/self-winding movement is powered by a thin spiral torsion spring, called the mainspring, which is housed in an enclosed barrel inside the movement. The energy produced from the wound spring drives the movement functions. An automatic watch has a weighted rotor mounted on a pivot to the back of the movement, and the rotor is connect to the mainspring through a series of gears. The natural motion of the wearers wrist will cause the rotor to spin, which in turn will automatically wind the mainspring. Please note: An automatic winding watch which has completely wound-down or is at the end of its power reserve requires manual winding. Manually winding an automatic watch ensures that the watch is at full power-reserve when first worn, and as long as the watch is in motion thereafter it will remain fully wound, ensuring that when the watch is removed it will run the specificed power-reserve duration. Close