IWC Ingenieur Big Ingenieur Chronograph Stainless Steel / Silver / Strap

Reference IW3784-05

About this watch

The IWC Big Ingenieur Chronograph IW3784-05 is a stunning example of IWC's ingenuity, combining quality, durability, and aesthetics in a robust and striking stainless steel case with a diameter of 45.50 mm. The silver dial features stick and dot indexes offering a sleek modern look, while the open sapphire case back showcases the intricate IWC movement, inviting admiration from every angle. With a self-winding flyback chronograph movement boasting a 68-hour power reserve and a frequency of 28,800 vibrations per hour, this watch is precision that watch enthusiasts crave. The flyback chronograph function allows for quick resetting of the timer without having to stop it first, perfect for timing multiple events seamlessly. With a water resistance of up to 120 meters, this timepiece is designed to withstand the rigors of daily life. Whether you're in a boardroom meeting or out for a weekend brunch, the IW3784-05 exudes confidence and style.
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Key Features

  • Stainless steel case with diameter of 45.50 mm
  • Silver dial with stick and dot indexes
  • Open sapphire case back showcasing IWC movement
  • Self-winding flyback chronograph movement
  • 68-hour power reserve
  • Water resistance up to 120 meters

Specifications

Brand
IWC
Family
Ingenieur
Model
Big Ingenieur Chronograph Stainless Steel / Silver / Strap
Reference
IW3784-05
Movement
89361
Movement Features
  • Hours, Minutes, Small Seconds
  • Date
  • Chronograph, Flyback
Case
Stainless Steel 45.5mm
Dial Color
Silver
Crystal
Sapphire
Water Resistance
120

Current Listings

[WTS] IWC Ingenieur Chronograph L.E. 1 out of 750 In-house Mvmt IW380702 $3,550

IWC Ingenieur Chronograph L.E. 1 out of 750 In-house Mvmt IW380702 $3,550

IWC - IW380702 · $3,550
This IWC Ingenieur Chronograph Edition 'Rudolf Caracciola' is a limited edition of 750 pieces, featuring an in-house movement and a functional instrument look.

  • Condition: Pre-owned with minor scratches
  • Movement: Calibre 69370 with 46 hour power reserve
  • Water resistance: 60m depth rating
  • Case size: 42mm diameter
Posted at
Dec 19, 2025, 11:10 AM
Active
[WTS] IWC Ingenieur 40 *Aqua Dial* 2025 Complete Set

IWC Ingenieur 40 *Aqua Dial* 2025 Complete Set

IWC - IW328903 · $9,150
This listing features the highly sought-after IWC Ingenieur Aqua Dial, a masterpiece of watchmaking with incredible finishing work and Genta-designed heritage.

  • Condition: Incredible Preowned Condition
  • Case size: 40mm diameter
  • Dial color: Aqua
  • Power reserve: 120 hours
Posted at
Dec 18, 2025, 10:18 AM
Active
[WTS] IWC Ingenieur Automatic 40 – Aqua Dial – Ref. IW328903

IWC Ingenieur Automatic 40 – Aqua Dial – Ref. IW328903

IWC - IW328903 · $9,700
This IWC Ingenieur Automatic features an Aqua blue dial with textured pattern and a 120-hour power reserve. It includes a stainless steel bracelet, sapphire crystal, date at 3 o'clock, and is water-resistant to 100m.

  • Power reserve: 120 hours
  • Water resistance: 100m
  • Bracelet material: stainless steel
Posted at
Dec 16, 2025, 10:00 PM
Active
[WTS] IWC Ingenieur (White Dial)

IWC Ingenieur (White Dial)

IWC - IW328902 · $8,000
The seller is listing an IWC Ingenieur with a white dial, reference IW328902, in excellent condition. The watch features a 40mm case, IWC caliber 32111 with a 120hr power reserve, and comes with the outer box, inner box, leather travel case, warranty card, manual, strap tools, and an integrated steel bracelet.

  • Condition: Excellent
  • Case size: 40mm diameter
  • Thickness: 10.8mm
  • Movement: IWC caliber 32111 (120 hour power reserve)
Posted at
Dec 15, 2025, 9:12 PM
Active
[WTS] IWC Ingenieur 40mm Aqua Dial 2025 Complete Kit

IWC Ingenieur 40mm Aqua Dial 2025 Complete Kit

IWC - IW328903 · $9,500
This IWC Ingenieur features a 40mm Aqua Dial and has a thin 10.7mm case with a 120 hour power reserve.

  • Condition: Incredible Preowned Condition
  • Case thickness: 10.7mm
  • Diameter: 40mm
  • Power reserve: 120 hours
Posted at
Dec 11, 2025, 9:33 AM
Active
[WTS] IWC Micro Adjust Clasp for Ingenieur 40 & Others

IWC Micro Adjust Clasp for Ingenieur 40 & Others

IWC - IW32890x · $375
Additional details on a preowned IWC clasp for the Ingenieur 40 and other models, allowing micro adjustment instead of the stock butterfly clasp.

  • Condition: Excellent condition
  • Compatible Watches: Not specified, but confirmed compatible with 40mm IW32890x model Ingenieur. Cross reference required for other models.
Posted at
Dec 11, 2025, 9:28 AM
Active
IWC Ingenieur Automatic  - IW323902 - Black - Stainless Steel - 39mm - Mint

IWC Ingenieur Automatic - IW323902 - Black - Stainless Steel - 39mm - Mint

IWC - IW323902 · $5,495
A pre-owned IWC Ingenieur Automatic in excellent condition, featuring a 39mm black stainless steel case and automatic movement. The watch is accompanied by its original box set, instruction manual, warranty card, and OEM rubber strap.

  • Condition: Pre-Owned - Grade: Mint
  • Case size: 39mm diameter
  • Bracelet type: Stainless Steel
  • Dial: Black
Posted at
Apr 8, 2025, 12:56 AM
Active
IWC Ingenieur Automatic - 40mm - Black Dial - IW328901 ( unworn / 2025 )

IWC Ingenieur Automatic - 40mm - Black Dial - IW328901 ( unworn / 2025 )

IWC - IW328901 · $9,995
This IWC Ingenieur Automatic watch features a 40mm stainless steel case and black dial, coming with all original boxes and papers.

  • Condition: unworn
  • Case size: 40mm diameter
  • Movement: IWC 32111 Calibre
Posted at
Mar 28, 2025, 3:41 PM
Active
1980's IWC Ingenieur Ref. IW3506 with Box

1980's IWC Ingenieur Ref. IW3506 with Box

IWC - IW3506 · $5,950
The IWC Ingenieur Ref. IW3506 is a vintage watch originally launched in 1955 as an anti-magnetic timepiece for engineers, featuring a soft iron inner case and IWC's Caliber 852. The Reference 3506 was introduced in the mid-1980s, offering a more wearable size with refined details like gold hour markers and a graph paper textured dial.

  • Condition: Vintage-Good
  • Movement: Automatic
  • Case Width: 35mm diameter
  • Strap Length: 7.50 inches
Posted at
Mar 27, 2025, 1:34 PM
Active