The Basics

Reference 3910 The Portofino Chronograph brings a sporty touch to the Portofino family. The striking push-buttons are reminiscent of the cockpit of 1960s Italian sports cars. The watch, which features a convex sapphire glass and appliquéd Roman numerals, is driven by either the automatic 79320 or 75320 calibre, both with a 44-hour power reserve.

Brand: IWC
Family: Portofino
Reference: IW3910-09 (aka: 3910-09, IW391009)
Name: Portofino Chronograph Stainless Steel / Silver / Milanese
Produced: 2011
Limited: No

Below is a detailed look at IWC’s model IW3910-09 from Portofino watch family, including the price, case details and movement features.

IWC Portofino IW3910-09

The Details

IWC’s Portofino Chronograph Stainless Steel / Silver / Milanese (IW3910-09 (aka: 3910-09, IW391009)) was originally released in 2011. This watch features a automatic movement beating at a frequency of 28800 bph (4 Hz) to provide a 44-hour power reserve when fully wound.

The Case

The stainless steel case measures 42mm in diameter and roughly 13.5mm thick. The round case is paired with a silver color dial with feuille-shaped hands, and a stick / dot hour markers and minute track, covered by a sapphire glass. IWC’s Portofino model IW3910-09 is water resistant up to 30 meters (98 ft). A solid caseback is over the back of the watch case.

Material: Stainless steel
Glass: Sapphire
Back: Solid
Shape: Round
Diameter: 42mm
Height: 13.5mm
Lug Width: N/Amm
W/R: 30

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Portofino IW3910-09 movement is a powered by caliber 75320 made by IWC. The 25-jewel automatic movement is 30mm in diameter. Its balance wheel oscillates at 28800 semi-oscillations per hour or 4 Hz. This movement offers a 44-hour power reserve.

Type: Automatic
Brand: IWC
Caliber: 75320
Base: Sellita SW500
Display: Analog
Diameter: 30mm
Jewels: 25
Reserve: 44 hours
Frequency: 28800 bph
Time: Hours, Minutes, Small Seconds
Chronograph: Chronograph
Additionals:

The Price

How much does the IWC’s Portofino IW3910-09 cost? This watch was introduced in 2011 and has been in IWC’s collection for around . This watch is not a limited release. As with most luxury watches, the price of depends on the availability and demand.

CURRENT PRICE: 6500

For more information, visit IWC online.

Specifications:

  • Brand: IWC
  • Model: Portofino Chronograph Stainless Steel / Silver / Milanese
  • Reference Number: IW3910-09 (aka: 3910-09, IW391009)
  • Limited: No

Case & Dial:

  • Material: Stainless steel
  • Glass: Sapphire
  • Back: Solid
  • Diameter: 42
  • Thickness: 13.5
  • Lug Width: N/A
  • Dial Color: Silver
  • Indexes: Stick / Dot and Feuille-shaped hands
  • Water Resistance: 30 meters

Movement:

  • Winding: Automatic
  • Brand: IWC
  • Caliber: 75320
  • Display: Analog
  • Diameter: 30mm
  • Jewels: 25
  • Power Reserve: 44 hours
  • Frequency: 28800 bph
  • Functions: Hours, Minutes, Small Seconds

About IWC

IWC logo

IWC is based in Schaffhausen, Switzerland, and was founded in 1868. Its signature lines are the Pilot’s Watches and the Portugieser, while other famous collections are the Aquatimer, Portofino and the Da Vinci. Many of IWC’s designs display a industrial type of beauty not often found in Swiss watchmaking. The same goes for its movements; while of very high standards, they are finished with an … engineers touch rather than that of an artist. One could very well say that IWC’s approach to watchmaking is more German in nature compared to many of its competitors; the ‘form follows function’ adagio is one held in high esteem in Schaffhausen. Notable watches and innovations created by IWC in the past include the digital ‘Pallweber’ pocket watch, the late 1930’s Portugieser, the 1985 Da Vinci with Kurt Klaus perpetual module, the split-seconds mechanism as designed by Richard Habring and the ceramic Da Vinci and Flieger 3705 – introduced many years before the material became fashionable. IWC also pioneered the use of titanium in wristwatches. In recent years, IWC has had a strong focus on in-house movements with prices rising accordingly. IWC is part of the Richemont group.

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