IWC · GST Aquatimer
Strap for GST Perpetual Calendar Stainless Steel / Silver / German
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
ReferenceIW3756-21 (aka: IW375621)
FamilyGST Aquatimer
MovementIWC caliber 79261
Hours, Minutes, Small Seconds | Date, Day, Month, Perpetual Calendar, Year Indicator | Chronograph
CaseStainless Steel
Straps for the GST Aquatimer IW3756-21 (aka: IW375621)
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 IW3756-21 (aka: IW375621), seen from the bench
The IWC GST Aquatimer IW3756-21 is an iconic dive chronograph from the late 1990s featuring a robust integrated case architecture and tool watch design. The 43mm stainless steel 316L case houses the complex IWC 79261 mechanical chronograph movement with perpetual calendar, month, day, and year indicators, offering 300 meters water resistance. The 22mm lug width is proportionally balanced to the 43mm diameter, measured internally between case shoulders.
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