IWC · GST Aquatimer
Strap for IWC GST Aquatimer IW3719-18
The Aquatimer Chrono-Automatic Titanium / Black / Rubber takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the GST Aquatimer IW3719-18
Selected for the 22 mm lug width · workshop selection
Blue Alligator and Rubber Hybrid Strap · rubber, for the water€138
Pink Rubber and Alligator Strap · rubber, for the water€138
Millenium Cognac Alligator Strap€195
Matte Blue Alligator Strap€195
Matte Grey Alligator Strap€195
Novonappa Black Military Style Strap for IWC Pilot€142
What I'm asked about the IWC GST Aquatimer IW3719-18
What strap size does the IWC GST Aquatimer IW3719-18 take?
The IWC GST Aquatimer IW3719-18 needs 22 mm between the lugs, usually 18 or 20 mm at the buckle. It's the size I've been fitting on it for years.
Can the strap on the IWC GST Aquatimer IW3719-18 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the IWC GST Aquatimer IW3719-18?
Yes, in 22 mm leather, as long as you don't wear it in the water: leather doesn't like the sea or the pool. For days in the water, rubber. On a 42 mm diver I go for a full-thickness strap, not a thin one.
Which strap do you recommend for the IWC GST Aquatimer IW3719-18?
Rubber if you wear it in the water; otherwise a 22 mm calf strap, full thickness. You'll find it ready in the 22 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
The GST Aquatimer IW3719-18, seen from the bench
Frequently asked questions
What is the best strap for the GST Aquatimer IW3719-18?
The best strap depends on the intended use. To enhance the brutal aesthetics of the brushed titanium case, we recommend black or dark brown varnished alligator, or smooth calf leather which imparts refined elegance. If you plan marine or diving use, a vulcanized rubber strap (black or blue) is the most radical and functional choice. A canvas NATO strap gives a military appearance consistent with the technical genealogy of the model. The strap's artisanal quality must match the case level to maintain aesthetic balance.
Is there an aftermarket strap compatible with the GST Aquatimer IW3719-18?
Yes, artisanal quality aftermarket straps are available specifically designed for the 22mm lug width. Milano Straps offers a collection of compatible straps in various materials: alligator, calf, NATO and rubber, all customizable in size, initials and choice of stitching thread. For a bespoke experience, the Casati Milano atelier creates custom straps with personal choice of leather and 18-month warranty, allowing you to obtain a unique piece adapted to your aesthetic and functional preferences.
How long does a leather strap last on the GST Aquatimer IW3719-18?
The lifespan of a leather strap depends on the quality of the leather, frequency of use and environmental conditions. An artisanal quality alligator or calf strap, if worn regularly (3-4 days a week), lasts an average of 3-5 years before requiring replacement. If the watch is worn in a marine environment or exposed to constant humidity, the lifespan is reduced. A rubber strap, being less delicate, has a lifespan of 5-7 years. Stitching is often the first point of failure: to extend the strap's life, avoid frequent wetting and dry it quickly if exposed to water. The Casati Milano atelier guarantees 18 months on custom-made straps.
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
Bespoke straps for IWC, in the atelier or by video call: casatimilano.com
