€7.500 Regular price

Iwc Ingenieur SL Paper Graph Grey 1980s

The 2nd generation Ingenieur SL has a lot going on. Design uniformity in the integrated bracelet and tonneau case, attractive details like the drilled porthole bezel and gold hands and indices.


The classic IWC signature on the grey graph-paper dial adds a sort of studious sophistication to this decidedly luxury but accessible 1980s sport watch and the best part is that it comes in excellent condition.



  • excellent overall condition, showing minor traces of use
  • 3- body stainless steel case with screw-down case back
  • 34 mm (without crown) / 40 mm (lug-to-lug) / 23 mm (between lugs)
  • can be worn up to a 18,5cm wrist
  • Year: 1980s
  • Reference: 3505 


  • Iwc Cal. 375 - automatic
  • 22 jewels, 28800 A/h, 42 hours power reserve
  • professionally serviced 11/2023
  • -15sec/d / 250°


  • original never touched grey graph-paper dial in flawless condition
  • original hands, dial and crown

Has this been authenticated?

All watches at Goldammer are guaranteed authentic by our trusted watchmakers and us. Certificate included!

Has this been serviced?

All watches at Goldammer are professionally serviced before being offered at our shop. Servicing is done by our trusted watchmakers and gone through very capable hands.

Mechanical guarantee?

Each watch comes with a 1-year mechanical warranty so if anything goes wrong, please let us know immediately.

Inspection period?

We definitely want you to love your watch, so you always have 14 days to fall in love or return to Goldammer, no questions asked.

How much is the shipping?

We exclusively deliver worldwide via DHL Express which is free for you.

General care?

Given that most of our watches are around half a century old, they will need to be treated with extra love and care, and they require servicing every 4-5 years.

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