Rado · Captain Cook

Strap for HyperChrome Captain Cook 42 Bronze / Brown

The HyperChrome Captain Cook 42 Bronze / Brown takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Not sure about the right strap, or can't find your watch?Message me on WhatsApp
Lug width20 mm
Case diameter42 mm
ReferenceR32504306 (aka: 01.763.0504.3.230)
FamilyCaptain Cook
MovementETA caliber C07.611 Hours, Minutes, Seconds | Date
Year2020
CaseCeramic, Bronze, Stainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Captain Cook R32504306

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Captain Cook R32504306, seen from the bench

The Rado Captain Cook R32504306 is a 42 mm sports watch combining ceramic, bronze, and stainless steel case materials with an ETA C07.611 caliber movement. This model features a 20 mm lug width and represents Rado's interpretation of 1960s Swiss diving watch heritage. The mixed-material construction—ceramic for scratch resistance, bronze for natural patina development, and steel for structural stability—creates a distinctive visual character that develops over time.

Frequently asked questions

What is the lug width of the Rado Captain Cook R32504306?

The lug width of the Rado Captain Cook R32504306 is exactly 20 mm. This dimension must be respected when replacing the strap to prevent stress on the lug holes and ensure proper fit and wearability.

Which type of strap is most suitable for the Rado Captain Cook R32504306?

The Captain Cook R32504306 accommodates alligator straps with tight grain for formal elegance, vegetable-tanned leather for natural patina development, thick NATO canvas for military emphasis, and vulcanised rubber for pure functionality. Strap selection depends on the desired aesthetic balance between heritage and modernity.

How do you change the strap on the Rado Captain Cook R32504306?

Use a spring bar tool to remove the elastic pins from the lug holes. Insert the tool under the pin, lift slightly, and extract the pin from its seat. Repeat on the other side. Insert the new 20mm strap and reinsert the spring bars until they lock with an audible click.

Are aftermarket straps compatible with the Rado Captain Cook R32504306?

Yes, any strap with a 20mm lug width is compatible with the R32504306. However, selecting a strap of elevated construction quality is essential to preserve the aesthetic authenticity of the ceramic and bronze case.

How long does a leather strap last on the Rado Captain Cook R32504306?

A quality leather strap with vegetable tanning and artisanal construction can last 3-5 years with routine maintenance and moisture protection. Alligator tends to outlast calf leather. Durability depends on aquatic exposure, frequency of use, and preventive care practices.

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 →

Casati Milano · Via XX Settembre 15, Milan · by appointment only

The atelier's website: casatimilano.com