IWC Portofino Portofino Automatic Day & Night 37

Reference IW4591-01

About this watch

The IWC IW4591-01 Portofino Automatic Day & Night 37 is a breathtaking timepiece that excels in both form and function. Its elegant design, combined with reliable automatic movement and thoughtful features, makes it a standout choice for anyone looking to invest in a luxury watch. The round stainless steel case is perfectly proportioned at 37 mm, making it a versatile choice for both men and women. The white mother-of-pearl dial adds a touch of luxury, while the gem-set bezel sparkles beautifully, drawing attention without being ostentatious. With its rich history, exquisite design, and practical features, this watch is a worthy investment that will serve you well for years to come. Whether you鈥檙e dressing up for a special occasion or simply want to elevate your daily attire, this watch is sure to impress.
Buy Now on Jomashop
This is an affiliate link

Key Features

  • IWC caliber 35700 automatic movement
  • Sapphire glass crystal with water resistance of 30 meters
  • Gem-set bezel and indexes
  • Feuille hands for easy readability
  • 24-hour hand for global timekeeping
  • Stainless steel case with 37 mm diameter
  • Comfortable 11 mm height and lightweight design

Specifications

Brand
IWC
Family
Portofino
Model
Portofino Automatic Day & Night 37
Reference
IW4591-01
Movement
35700
Movement Features
  • Hours, Minutes, Seconds, Additional 24 Hour Hand (adjustable)
Case
Stainless Steel 37mm
Dial Color
White
Crystal
Sapphire
Water Resistance
30

Current Listings

[WTS] IWC pre-Portofino Ref. 3205 (Jaeger LeCoultre 889) Automatic Caliber 3254 馃尀 Vintage Buckle 馃敟 1979 Papers 馃敟

IWC pre-Portofino Ref. 3205 (Jaeger LeCoultre 889) Automatic Caliber 3254 馃尀 Vintage Buckle 馃敟 1979 Papers 馃敟

IWC - 3205 $1,250
A vintage dress piece from IWC featuring a thin stainless steel case, sapphire crystal, and the rare Caliber 3254. It has a beautiful rhodium finish gray face and measures 34mm in diameter.

  • Condition: Excellent, great condition for a 45 year old watch
  • Case size: 34mm diameter
  • Lug width: 18mm
Posted at
Aug 18, 2025, 10:42 AM
Active
IWC Portofino Automatic 40MM IW356303 Silver Dial

IWC Portofino Automatic 40MM IW356303 Silver Dial

IWC - IW356303 $2,080
IWC Portofino Automatic 40MM IW356303 Silver Dial is a men's watch with a mechanical automatic movement.

  • Condition: 90%
  • Size: 40mm diameter
  • Case material: Stainless Steel
Posted at
Apr 8, 2025, 8:48 AM
Active
2024 IWC Portofino Hand-Wound Moon Phase Silver Steel FULL SET MINT IW516401

2024 IWC Portofino Hand-Wound Moon Phase Silver Steel FULL SET MINT IW516401

IWC - IW516401 $8,875
This IWC Portofino Hand-Wound Moon Phase features a silver-plated dial with a moon phase display, high-polished stainless steel domed bezel and case, and an exhibition caseback offering a clear view of the movement. It has an 8-day power reserve when fully wound and includes various functions such as hours, minutes, date, small seconds subdial, moon phase display, and power reserve indicator.

  • Condition: Mint
  • Case Size: 42mm
  • Material: stainless steel
  • Movement Type: hand-wound
Posted at
Apr 2, 2025, 5:33 PM
Active
IWC Portofino 18K Rose Gold Grey Dial Eight Days 45mm IW510104

IWC Portofino 18K Rose Gold Grey Dial Eight Days 45mm IW510104

IWC - IW510104 $8,190
The IWC Portofino is a men's watch featuring a grey dial and 18K rose gold case, with a size of 45mm. It has a mechanical manual movement and functions include date and power reserve.

  • Condition: 90%
  • Case material: 18K Rose Gold
  • Movement type: Mechanical Manual
  • Size: 45mm
Posted at
Mar 6, 2025, 9:28 AM
Active
IWC Portofino Hand-Wound 8 Days Hand-Wound Black Steel 45mm IW510102 Strap

IWC Portofino Hand-Wound 8 Days Hand-Wound Black Steel 45mm IW510102 Strap

IWC - IW510102 $4,199
The IWC Portofino Hand-Wound 8 Days is a pre-owned watch with a black steel case, featuring an IWC hand-wind movement and 45mm diameter. It comes with an IWC box, papers, and a brown leather strap.

  • Condition: Excellent
  • Case material: Stainless Steel
  • Crystal type: Sapphire
  • Movement type: Hand Wind
Posted at
Feb 28, 2025, 7:57 PM
Active
IWC Portofino Automatic White Dial 38mm IW353303

IWC Portofino Automatic White Dial 38mm IW353303

IWC - IW353312 $2,275
The IWC Portofino Automatic White Dial is a 38mm men's watch with a mechanical automatic movement and date function, housed in a stainless steel case.

  • Condition: 90%
  • Case size: 38mm
  • Movement type: Mechanical Automatic
Posted at
Feb 16, 2025, 8:46 AM
Active
IWC Portofino Chronograph Black Dial Automatic IW391002

IWC Portofino Chronograph Black Dial Automatic IW391002

IWC - IW391002 $2,990
The IWC Portofino Chronograph Black Dial Automatic IW391002 is a men's watch featuring a stainless steel case and mechanical automatic movement. It has a chronograph function and date display.

  • Condition: 95%
  • Size: 42mm
  • Function: Chronograph ; Date
  • Case Material: Stainless Steel
Posted at
Feb 11, 2025, 10:19 AM
Active
FOST: IWC Portofino Hand-Wound Moon Phase Silver Steel FULL SET MINT IW516401

FOST: IWC Portofino Hand-Wound Moon Phase Silver Steel FULL SET MINT IW516401

IWC - IW516401 $9,785
The IWC Portofino Hand-Wound Moon Phase features a silver-plated dial with a moon phase display, high-polished stainless steel domed bezel, and an exhibition caseback offering a clear view of the movement.

  • Condition: Mint condition
  • Case Material: Stainless Steel
  • Diameter: 40mm
Posted at
Feb 7, 2025, 3:58 PM
Active