IWC · GST Aquatimer
Strap for GST Perpetual Calendar Stainless Steel / Black / French
Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
22mm
Lug width22 mm
Case diameter43 mm
ReferenceIW3756-16 (aka: IW375616)
FamilyGST Aquatimer
MovementIWC caliber 79261
Hours, Minutes, Small Seconds | Date, Day, Month, Perpetual Calendar, Year Indicator | Chronograph
CaseStainless Steel
Straps for the GST Aquatimer IW3756-16 (aka: IW375616)
Selected for the 22 mm lug width · workshop selection
Novonappa Black Military Style Strap for IWC Pilot€155
Novonappa Brown Military Style IWC Pilot Strap€155
Millenium Cognac Alligator Strap€270
Matte Blue Alligator Strap€270
Matte Black Alligator Strap€270
The GST Aquatimer IW3756-16 (aka: IW375616), seen from the bench
The IWC GST Aquatimer IW3756-16 is a military-derived diving instrument from the early 1990s featuring a patented dual-crown system that isolates timing from vibrations during tactical immersion. The stainless steel 316L case measures 43mm with 22mm lugs and houses caliber 79261, an automatic chronograph with perpetual calendar complication. Water-resistant to 120 meters, it combines technical robustness with functional design.
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