IWC · GST Aquatimer
Strap for Aquatimer Automatic Stainless Steel / Silver / ZSC Lions
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
ReferenceIW3290-07 (aka: IW329007)
FamilyGST Aquatimer
MovementIWC caliber 30120
Hours, Minutes, Seconds | Date
CaseStainless Steel
Straps for the GST Aquatimer IW3290-07 (aka: IW329007)
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 IW3290-07 (aka: IW329007), seen from the bench
The IWC GST Aquatimer IW3290-07 is a professional diving instrument from the 1990s featuring a robust 42mm stainless steel case with integrated bracelet and IWC caliber 30120 automatic movement. The watch displays hours, minutes, seconds and date, with a 20mm lug width designed to maintain proportional balance with the case diameter. Built as a functional tool rather than a concession to aesthetics, this model embodies Swiss engineering philosophy where durability and readability in demanding marine environments take precedence.
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