Strap for Aquatimer Chronograph Stainless Steel / Blue / Rubber

The lug width of the IWC GST Aquatimer IW3767-04 is 22 millimetres. This width is determined by the proportional design of the 44mm case and conforms to ISO specifications for professional diving watches. Always verify by measuring the distance between the lug holes with a digital calliper to guarantee compatibility.

For the GST Aquatimer we recommend three options depending on use: vegetable-tanned Tuscan leather (for daily wear and elegance, developing natural patina over time), alligator (for sophistication and humidity resistance), or vulcanised rubber or Tropic rubber (for regular diving and dimensional stability). NATO nylon straps are ideal if you frequently change between water and land use.

Obtain a spring bar tool (a dedicated instrument for removing lug bars). Position the forked end under one of the lower lugs, gently push upward to release the spring, then extract the bar. Repeat for the other lug. Insert the new strap by aligning it with the holes and press downward until it clicks. Ensure the lug is fully locked before wearing the watch.

Yes, provided it respects the 22mm standard. Milano Straps and certified manufacturers offer 22mm-compatible straps for the GST Aquatimer IW3767-04. Verify that the strap has been designed for professional sports diving watches, especially if you intend to use it underwater, as stitching quality and materials are critical.

A Tuscan vegetable-tanned leather strap has an average lifespan of 3–5 years with daily use. Longevity depends on exposure to moisture, direct sunlight, and frequency of use. Rubber straps last 4–7 years. Alligator, being a denser leather, can last 8–10 years. Regular maintenance (gentle cleaning, drying after exposure to water) significantly extends useful life.