IWC
Ingenieur IW3505-04— lug 20mm
IWC Ingenieur IW3505-04: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
IWC IW3505-04The essential strap measurement.
Browse 20mm straps →IW3505-04
IWC caliber 375 Hours, Minutes, Seconds | Date
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Ingenieur
FAQ
What is the lug width of the IWC Ingenieur IW3505-04?
The IWC Ingenieur IW3505-04 is equipped with a 20mm lug width. This measurement is specific to this model and is not interchangeable with other references. The correct measurement is taken by positioning a caliper between the two internal lugs of the case: always verify the measurement before ordering a strap.
What strap is recommended for the IWC Ingenieur IW3505-04?
The ideal strap depends on use and personal preference. A dark brown alligator or crocodile leather enhances formal elegance, while vegetable-tanned leather prison-dyed leather imparts artisanal character. For a more sporty style, a grayish NATO or midnight blue strap pairs beautifully with the steel case. A vulcanized natural rubber strap represents the most versatile choice for practicality and durability.
How do I change the strap on my IWC Ingenieur IW3505-04?
To change the strap on the Ingenieur IW3505-04 you will need a spring bar tool and a flat work surface. Position the watch face down, insert the flat end of the tool into the small hole beneath the lug, gently lift to release the spring bar, and slide off the previous strap. Repeat on the opposite side, then insert the new spring bars into the case holes. If you prefer to avoid any risk, the Casati Milano atelier offers a strap change service.
Is the strap I buy online compatible with the IWC Ingenieur IW3505-04?
Yes, provided the lug width is exactly 20mm. On milanostraps.it, 20mm straps are specifically selected for this measurement. Each strap is constructed with the correct lug-spring bar-lug configuration. If you have any doubt about the measurement, contact our Casati Milano atelier via WhatsApp for personalized advice.
How long does a leather strap last on the IWC Ingenieur IW3505-04?
The durability of a leather strap depends on the quality of the material, the type of leather, and daily use. An artisanal strap made with vegetable-tanned prison-dyed leather, such as those from Milano Straps, maintains its structural integrity for 3-5 years of regular use, with aesthetic aging that enhances its character. Casati Milano straps include an 18-month warranty. Prolonged exposure to water and sweat can reduce durability: we recommend allowing the strap to air dry after sea bathing or intense perspiration.
The next step
The right strap isn’t chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →By appointment only · Milan
The atelier's website: casatimilano.com