IWC
GST Aquatimer IW3548-05 (aka: 3548-05, IW354805)— lug 20mm
IWC GST Aquatimer IW3548-05 (aka: 3548-05, IW354805): 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 IW3548-05 (aka: 3548-05, IW354805)The essential strap measurement.
Browse 20mm straps →IW3548-05 (aka: 3548-05, IW354805)
IWC caliber 30110 Hours, Minutes, Seconds | Date
The Heritage
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Selected for the 20mm lug width of the GST Aquatimer
FAQ
What is the lug width of the IWC GST Aquatimer IW3548-05 (aka: 3548-05, IW354805)?
The lug width of the IWC GST Aquatimer IW3548-05 is 20 millimetres. You can verify this by measuring the distance between the two attachment points of the strap to the side lugs of the case. This standard measurement is compatible with the entire collection of 20mm straps available on Milano Straps.
Which strap is recommended for the IWC GST Aquatimer IW3548-05?
For the GST Aquatimer IW3548-05, the most suitable straps are rubberized calf or crocodile leather in dark tones (black, brown, navy blue), which enhance the technical and professional character of the dive watch. For intense aquatic use, the Tropic rubber strap offers maximum durability. A cotton or canvas NATO returns the model to its sporting-tactical origins while maintaining aesthetic simplicity.
How do you change the strap on an IWC GST Aquatimer IW3548-05?
To change the strap on an IWC GST Aquatimer IW3548-05, you need to remove the spring bars located at the two side attachment points of the case. Using a dedicated tool or small screwdriver, press the bar from one side to release the previous strap, then insert the new strap by aligning the side holes with the bars and snap into place. We recommend having a professional watchmaker perform this operation to avoid damaging the case.
Is it possible to fit an aftermarket strap on an IWC GST Aquatimer IW3548-05?
Yes, the IWC GST Aquatimer IW3548-05 is fully compatible with 20 millimetre aftermarket straps. Milano Straps offers a complete collection of professional and artisan straps made from leather, alligator, NATO, and rubber, customizable in size, initials, and stitching thread colour. Each strap is tested to ensure perfect compatibility with the 20mm lug width.
How long does a leather strap last on a watch like the GST Aquatimer IW3548-05?
The lifespan of a leather strap depends on the quality of the leather, the intensity of use, and environmental conditions. An artisan strap made from quality full-grain leather, such as those from Casati Milano, has an average durability of 3-5 years with daily use. More robust leathers like crocodile and alligator can last longer. Frequent exposure to moisture and water reduces longevity; for this reason, in intense underwater conditions it is advisable to alternate with Tropic rubber straps.
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