IWC Ingenieur SL Ref. 3508 – Rare Fourth Generation Sports Elegance

The IWC Ingenieur SL Ref. 3508 represents the fourth generation of the Ingenieur line and captures the late-1980s interpretation of the integrated luxury sports watch perfectly. Produced between 1989 and 1992, this configuration is especially rare, with only 614 pieces made.

Its design combines a tonneau-shaped stainless steel case with an integrated bracelet, creating a strong and cohesive silhouette. Details such as the drilled portholes on the bezel, gold hands, and matching indexes give the watch a refined yet technical appearance.

The flawless deep black dial with the classic IWC signature adds a quiet sophistication to this sporty design, balancing functionality with understated luxury. Inside beats the automatic IWC Cal. 37590, offering reliable performance in a slim and highly wearable case.

A rare and beautifully preserved Ingenieur — combining industrial design, collector relevance, and everyday versatility.

 - wrist size in our picture is 18cm circumference -

BRACELET & CLASP:

• original IWC stainless steel bracelet with no stretch is fitting up to 20 cm wrist size / 3 mm thick
  
• original IWC stainless steel clasp

CASE:

• great overall condition, showing minor traces of wear
• 3- body stainless steel case with screw-down case back
• 34 mm (without crown) / 40 mm (lug-to-lug) / 23 mm (between lugs) / 8.8 mm thick
  
• year: 1989-1992
• reference: 3508 
• total weight: 113 g

MOVEMENT:

• IWC Cal. 37590 - automatic
• 21 jewels, 28800 A/h, 42 hours power reserve
• professionally serviced 05/2026
• +8 sec/d / 270°