IWC Ingenieur SL white graph paper dial – Automatic Ref. 3505 – Gerald Genta – 1982

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The „Skinny“ one.

Something for the connaisseure of rare IWC watches.
If you are looking for a graph paper dial Ingenieur SL automatic you will notice that most of the available ones are reference 3506 and have a „swiss made“ signed dial.

This version though is a bit different. Its the very first version of the midsize Ingenieur after the release of the iconic 1832 jumbo.

It not only has an absolutely rare centered bezel but also has a „SWISS“ only dial. This version was released under the reference 3505 in 1982 (apprx).
This is a watch you don’t see every day and that will become even rarer to the marked once you bought this one…because you’ll want to keep it, for sure!

Case and bracelet are in good condition, but have been polished during the years. Still looking great, though!

Dial has some minor spots but nothing that is distracting the eye from the great looking graph paper pattern.

This version is still all white, while the dials on the latter 3506 references have e blueish touch in the white pattern.

The Indexes are in good conditon, as well as the hands are.
Original integrated steel bracelet fits up to about 19cm wrist size.

Observing the marked prices for more common 3506, you will notice that the demand for rare Ingenieurs is high. Just a beauty and a great investment piece as well. Take the opportunity to own one of the rarest Ingenieur references out there, the 3505.

IWC automatic calibre 375.

Pictures with centered bezel are the last ones added after service! Bezel is centered, which is an absolutely rare coincidence on these Ingenieurs. Gasket has been replaced.


  • High quality Watchurbia watch box
  • certificate incl. photos
  • service report (11/2022)
  • warranty certificate


34 mm measured without crown


24 months*

*You can find the warranty conditions under this LINK


7.900 €

How to buy:

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The item is differential taxed according to § 25a UStG (German tax law). You will therefore receive an invoice WITHOUT VAT shown separately.

You will not have to pay extra VAT or import charges when buying from any EU country!


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