IWC · GST Aquatimer
Strap for Aquatimer Automatic Stainless Steel / Black / Bracelet
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
20mm
Lug width20 mm
Case diameter42 mm
ReferenceIW3548-05 (aka: 3548-05, IW354805)
FamilyGST Aquatimer
MovementIWC caliber 30110
Hours, Minutes, Seconds | Date
CaseStainless Steel
Straps for the GST Aquatimer IW3548-05 (aka: 3548-05, IW354805)
Selected for the 20 mm lug width · workshop selection
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
Novonappa Black Strap — IWC Pilot Style€149
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
The GST Aquatimer IW3548-05 (aka: 3548-05, IW354805), seen from the bench
The IWC GST Aquatimer IW3548-05 is a professional dive watch from the 1990s featuring a 42mm stainless steel case and the automatic caliber 30110 movement with hours, minutes, seconds and date. The unidirectional bezel offers 60 clicks with industrial grip for precise operation even with diving gloves, while the integrated bracelet is engineered for underwater operations with sculptural link geometry. Water resistance exceeds 200 meters, meeting ISO 6425 professional dive watch standards, and the lug width is 20mm.
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