IWC Ingenieur Ref.3506 Papper graph dial
The big picture
Things you should know
This IWC Ingenieur Ref. 3506 is an outstanding example of the reference, featuring a beautifully preserved case and bracelet that maintain their original sharp lines and classic profile. The case remains crisp and robust, showing only a few scratches that attest to its authenticity and careful use over time. While it has been polished in the past, it retains its strong shape, with particularly well-preserved bevels—an essential characteristic that enhances its appeal.
The caseback exhibits minor marks consistent with regular wear, a testament to the watch being enjoyed rather than stored away. Notably, the original serial engravings remain visible on the exterior—a rare feature, as these markings are often lost through wear.
The dial and hands are in excellent condition. The gold-toned hands, with well-preserved lume, complement the stunning white paper-graph dial, which appears spotless to the naked eye. Only under magnification and strong lighting do a few minor spots and imperfections become visible. The hands show minimal oxidation, while the dial has retained its crisp original hue. All lume plots on the dial remain in very good condition, having aged to a warm golden tone that contrasts subtly with the slightly whiter lume on the hands.
The bracelet is another highlight of this piece. With minimal stretch and only some scratches, it maintains exceptional structural integrity, reflecting the care it has received over the years.
Every component—the case, dial, and movement—bears IWC’s signature, ensuring full authenticity. The crystal is in near-perfect condition, free from noticeable scratches, preserving a clear view of this remarkable dial. Additionally, the watch is accompanied by its original 1988 papers and an official IWC service record from 1997.
Inner workings
Brand: Iwc
Model: Ingenieur
Reference: 3506
Serial Nr: 2388***
Year: 1988
Material: Gold and Steel
Dimensions: 34
mm diameter and 40mm lug to lug
Crystal: Sapphire
Movement: Automatic Cal 37531
Bracelet/Strap: Original stainless steel bracelet
Bracelet Width: 20
mm
Box/Warranty: No/Yes
Wrist dimensions: This watch was photographed on a 175mm/6.9inch wrist.
Mechanical warranty
Each watch is accompanied by a 1-year mechanical warranty, providing coverage for all its components starting from the date of purchase. Furthermore, prior to being showcased for online sale, every watch undergoes a thorough overhaul by our watchmaker, guaranteeing its optimal condition.
Certainly, the warranty extends specifically to cover wear and tear of the movement. It's important to note that damages resulting from misuse or accidental incidents will not fall under the protection of the warranty.
It's essential to bear in mind that all the watches are over 20 years old. Consequently, while they offer unique charm and character, you should understand that they may not exhibit the same precision as modern watches.
