TWCO · Sea Rescue Diver

Strap for Sea Rescue Diver Orange

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter44 mm
ReferenceSRD-O
FamilySea Rescue Diver
MovementMiyota caliber 9015 hours, minutes, seconds | date
Year2012
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Sea Rescue Diver SRD-O

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Sea Rescue Diver SRD-O, seen from the bench

The TWCO Sea Rescue Diver SRD-O is a professional dive watch with a 44mm stainless steel case and quartz Miyota caliber 9015 movement. Built on military diving heritage, this model combines functional design with balanced proportions, featuring a unidirectional bezel, scratch-resistant crystal, and satin-finished steel case. The 22mm lug width accommodates robust straps while maintaining visual proportion and functionality for underwater operations.

Frequently asked questions

What is the lug width of the TWCO Sea Rescue Diver SRD-O?

The TWCO Sea Rescue Diver SRD-O features a lug width of 22mm. This measurement represents the distance between the two spring bars that attach the strap to the case. Always verify this dimension before purchasing a replacement strap to ensure perfect compatibility.

What is the best strap for the TWCO Sea Rescue Diver SRD-O?

There is no single "best" strap in absolute terms, but rather choices that align with your intended use. For underwater environments, a synthetic NATO offers practicality and durability. For formal daily wear, leather in calf or alligator provides sophistication. For extreme marine performance, rubber remains the most reliable choice. Your decision should reflect your relationship with the watch.

How do you change the strap on the TWCO Sea Rescue Diver SRD-O?

Changing the strap is a straightforward procedure. Position the watch face-up and locate the spring bars that run through the lugs on both sides of the case. Use a spring bar remover tool to gently push the bars inward and slide them out of their slots. Remove the old strap and insert the new strap's spring bars into the same slots, ensuring they click securely into place on both sides.

Which aftermarket straps are compatible with the TWCO Sea Rescue Diver SRD-O?

Any strap designed for a 22mm lug width is compatible with the SRD-O. This includes full-grain leather straps, alligator leather, shell cordovan, NATO straps in nylon or recycled synthetics, rubber straps, and models featuring steel deployante buckles. Compatibility depends solely on lug width, regardless of the strap manufacturer.

How long does a leather strap last on a diving watch like the SRD-O?

A quality leather strap, subjected to moderate use, will last 3–5 years before showing significant wear. However, if regularly exposed to salt water or fresh water, the lifespan reduces to 1–2 years. For a Sea Rescue Diver intended for frequent diving, it is advisable to prioritise NATO or rubber straps, which are far more resistant to moisture and marine environments.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only