IWC Ingenieur Ingenieur SL Automatic Stainless Steel / Yellow Gold / Black / Bracelet

Reference IW3505-12

IWC Ingenieur SL Automatic Stainless Steel / Yellow Gold / Black / Bracelet

About this watch

The IWC Ingenieur SL Automatic (IW3505-12) is an exquisite timepiece that embodies luxury and functionality. Produced between 1983 and 1990, this watch combines stainless steel and yellow gold for a striking contrast that exudes classic elegance. With its compact size of 34.00 mm and height of just 8.60 mm, the Ingenieur SL is remarkably comfortable on the wrist. The sleek black dial with stick and dot indexes enhances readability while maintaining a minimalist aesthetic. At the heart of this watch is the IWC caliber 375, a self-winding movement that ensures precise timekeeping and reliability. With its impressive water resistance of 120 meters, this watch is suitable for various activities, including swimming or snorkeling. The addition of a date function and comfortable stainless steel bracelet make it a versatile companion for everyday wear. This iconic timepiece showcases IWC's commitment to quality and performance, making it a timeless classic that combines historical significance with modern usability.

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Key Features

Timeless Design
Reliable Movement (IWC Caliber 375)
Good Water Resistance (120 meters)
Comfortable Stainless Steel Bracelet

Specifications

Brand

IWC

Family

Ingenieur

Model

Ingenieur SL Automatic Stainless Steel / Yellow Gold / Black / Bracelet

Reference

IW3505-12

Movement

375

Movement Features

Hours, Minutes, Seconds
Date

Case

34mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

120

Current Listings

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

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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

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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

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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

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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

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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

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IWC Ingenieur Automatic IW357001 $2,699

IWC - IW357001 · $2,699

The IWC Ingenieur IW3570 is a well-crafted watch that combines classic design with modern functionality. It has balanced proportions and quality finishing, making it a strong contender in its category.

Condition: Pre-owned with minor scratches on polished bezel
Case Size: 40mm diameter
Case Thickness: 10.3mm
Lug Width: 20mm

Posted at

Dec 10, 2025, 12:49 PM

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