The Basics

The ref. IW3712-07 is a limited edition of 100 pieces of the Portuguese Chrono-Rattrapante with a sapphire caseback.

Brand: IWC
Family: Portugieser
Reference: IW3712-07 (aka: 3712-07, IW371207)
Name: Portuguese Chrono-Rattrapante Open Caseback
Produced: 1996 – 2004
Limited: Yes, 100 units

Below is a detailed look at IWC’s model IW3712-07 from Portugieser watch family, including the price, case details and movement features.

IWC Portugieser IW3712-07

The Details

IWC’s Portuguese Chrono-Rattrapante Open Caseback (IW3712-07 (aka: 3712-07, IW371207)) was originally released in 1996 – 2004. This watch features a hand-wound movement beating at a frequency of 21600 bph (3 Hz) to provide a 44-hour power reserve when fully wound.

The Case

The stainless steel case measures 40.9mm in diameter and roughly 12.3mm thick. The case is paired with a silver color dial with feuille-shaped hands, and a arabic numerals hour markers and minute track, covered by a sapphire glass. IWC’s Portugieser model IW3712-07 is water resistant up to 30 meters (98 ft). A display caseback is over the back of the watch case.

Material: Stainless steel
Glass: Sapphire
Back: Display
Diameter: 40.9mm
Height: 12.3mm
Lug Width: N/Amm
W/R: 30

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Portugieser IW3712-07 movement is a powered by caliber 76240 made by IWC. The 31-jewel hand-wound movement is 30mm in diameter. Its balance wheel oscillates at 21600 semi-oscillations per hour or 3 Hz. This movement offers a 44-hour power reserve.

Type: Hand-Wound
Brand: IWC
Caliber: 76240
Base: ETA 7750
Display: Analog
Diameter: 30mm
Jewels: 31
Reserve: 44 hours
Frequency: 21600 bph
Time: Hours, Minutes
Chronograph: Chronograph, Rattrapante

The Price

How much does the IWC’s Portugieser IW3712-07 cost? This watch was introduced in 1996 and has been in IWC’s collection for around . This watch is a limited edition with just 100 pieces released. As with most luxury watches, the price of depends on the availability and demand.

CURRENT PRICE: Not Available

For more information, visit IWC online.


  • Brand: IWC
  • Model: Portuguese Chrono-Rattrapante Open Caseback
  • Reference Number: IW3712-07 (aka: 3712-07, IW371207)
  • Limited: Yes, 100 units

Case & Dial:

  • Material: Stainless steel
  • Glass: Sapphire
  • Back: Display
  • Diameter: 40.9
  • Thickness: 12.3
  • Lug Width: N/A
  • Dial Color: Silver
  • Indexes: Arabic Numerals and Feuille-shaped hands
  • Water Resistance: 30 meters


  • Winding: Hand-Wound
  • Brand: IWC
  • Caliber: 76240
  • Display: Analog
  • Diameter: 30mm
  • Jewels: 31
  • Power Reserve: 44 hours
  • Frequency: 21600 bph
  • Functions: Hours, Minutes

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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