IWC Ingenieur Ref. 3506 – Black Graph Paper Dial

A very attractive example of the IWC Ingenieur 3506 featuring the highly sought-after black graph paper dial.

The case is in fair condition, showing honest signs of wear and previous polishing, yet it remains strong overall. The bezel is particularly nice and centered. The bracelet is also in fair condition, displaying signs of wear and light stretch consistent with age.

The highlight of this watch is undoubtedly its beautiful and entirely original black graph paper dial. All original lume plots are present and intact, and the original hands remain fitted, showing only minor corrosion.

Mechanically, the watch is running strong and is powered by the IWC Cal. 3753 automatic movement, featuring the characteristic 21K gold rotor. For additional peace of mind, the watch is sold with a 12-month warranty.

For many collectors, the black graph paper dial represents the purest expression of the 34mm Ingenieur family—and it’s easy to see why. Combining the iconic Genta-inspired design with one of the most distinctive dial configurations ever offered by IWC, the 3506 remains an understated collector’s favorite.

Fitting up to about 18.2cm

Time grapher result: +2 sec / 297 amplitude / 0.0 ms beat error