The 4th generation Ingenieur SL has a lot going on. Design uniformity in the integrated bracelet and tonneau case, attractive details like the drilled portholes on 18k yellow gold bezel and gold hands and indices. Only 341 pieces of this configuration were produced between 1989 and 1992.

 

The classic IWC signature on the deep black dial adds a sort of studious sophistication to this decidedly luxury but accessible sport watch and the best part is that it comes in excellent almost unworn condition.

 

CASE:

• excellent overall condition, showing no traces of use
• 3- body stainless steel / 18k yellow gold 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: 102 g

MOVEMENT:

• IWC Cal. 37590 - automatic
• 21 jewels, 28800 A/h, 42 hours power reserve
• professionally serviced 08/2024
• +5 sec/d / 280°

DIAL:

• original never touched black dial in flawless condition
• original hands and crown