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.

Buy Now on Jomashop

This is an affiliate link

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 Automatic 40mm Titanium IW328904 ( unworn / 2025 / box and papers )

IWC - IW328904 · $14,950

This IWC Ingenieur Automatic is a 40mm grey dial titanium watch with an automatic movement. It comes complete with all original boxes, papers, and tools.

Condition: unworn
Case size: 40mm diameter
Movement type: automatic

Posted at

Apr 14, 2026, 1:26 PM

Active

View listing on r/WatchExchange

IWC Ingenieur Automatic 40mm Aqua IW328903 ( unworn / 2025 / box and papers )

IWC - IW328903 · $10,250

Up for sale is an unworn IWC Ingenieur Automatic 40mm Aqua Dial reference # IW328903, complete with all boxes and papers. It features a stainless steel case and the IWC 32111 Calibre Movement.

Condition: Unworn
Movement: IWC 32111 Calibre Movement
Case size: 40mm diameter
Depth rating: unknown

Posted at

Apr 14, 2026, 1:20 PM

Active

View listing on r/WatchExchange

IWC Ingenieur 40 Aqua Dial, Pristine Condition, w/ service papers from IWC and Box

IWC - IW324-001 · $10,500

This is a listing for an IWC Ingenieur 40 Aqua Dial, with service papers from the manufacturer and included box.

Condition: Pristine
Water resistance: 30 bar
Service papers from iwc and box:

Posted at

Apr 10, 2026, 12:01 PM

Active

View listing on r/WatchExchange

IWC Big Ingenieur Flyback Chronograph – Guilloché Dial – Box & Papers

IWC - IW378401 · $6,500

A watch for those who want a true chronograph tool with the elegance to double as a statement piece — robust for everyday use, refined for evenings. This timepiece combines heavy-duty engineering with fine watchmaking.

Case size: 45.5mm
Material: stainless steel
Band material: leather

Posted at

Apr 8, 2026, 6:49 PM

Active

View listing on r/WatchExchange

IWC Ingenieur IW357001 Under Warranty till 2031 $2,600

IWC - IW357001 · $2,600

The IWC Ingenieur IW3570 combines a classic design with modern functionality, featuring a date complication and balanced proportions.

Condition: Pre-owned
Case Size: 40mm diameter
Case Thickness: 10.3mm
Lug Width: 20mm

Posted at

Apr 7, 2026, 11:36 AM

Active

View listing on r/WatchExchange

IWC Ingenieur Automatic 40 IW328904 | Titanium | Near-Mint | Full Set

IWC - IW328904 · $13,250

The IWC Ingenieur Automatic 40 (Ref. IW328904) in titanium with grey grid dial is a modern reinterpretation of the iconic Gerald Genta-inspired integrated sports watch, featuring a lightweight and versatile design with a titanium case and bracelet.

Condition: Near-Mint
Case material: Titanium
Case dimensions: 40mm diameter | 10.8mm thickness
Dial color: Grey

Posted at

Apr 6, 2026, 10:26 PM

Active

View listing on r/WatchExchange

2024 IWC Ingenieur Automatic 40 Ref. IW328903 Aqua Full Kit

IWC - IW328903 · $9,600

A 2024 IWC Ingenieur Automatic 40 Ref. IW328903 Aqua Full Kit is being sold with a clean crystal, pristine dial, and automatic movement running well.

Condition: Great condition overall, light signs of wear on stainless steel case and integrated bracelet
Case size: 40mm diameter
Movement type: Automatic

Posted at

Apr 6, 2026, 9:50 PM

Active

View listing on r/WatchExchange

IWC Ingenieur Black 🔥Complete 2013, $4950+✈️🔥

IWC - IW323902 · $4,950

A complete IWC Ingenieur Black from 2013, comes with box, warranty, and manuals.

Condition: Preowned
Shipping cost to us states: $100
Payment methods: Wire or Credit Card (+4.9% for credit card)

Posted at

Apr 5, 2026, 7:20 AM

Active

View listing on r/WatchExchange

IWC Ingenieur Automatic 40 IW328904 | Titanium | Near-Mint Full Set | $13,000 Shipped

IWC - IW328904 · $13,000

This IWC Ingenieur Automatic 40 is a recent integrated-bracelet sports watch release with great wrist presence, excellent finishing, and added comfort of titanium. It's powered by IWC's in-house movement with a 120-hour power reserve.

Condition: Near-mint
Material: Titanium
Case size: 40mm diameter
Movement type: In-house automatic

Posted at

Apr 4, 2026, 6:13 PM

Active

View listing on r/WatchExchange