Seiko · Prospex Divers

Strap for Prospex Diver Samurai Stainless Steel / Orange / Bracelet

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
ReferenceSRPB97
FamilyProspex Divers
MovementSeiko caliber 4R35 hours, minutes, seconds | date
Year2017
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 Prospex Divers SRPB97

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Prospex Divers SRPB97, seen from the bench

The Seiko Prospex Divers SRPB97 is powered by the automatic caliber 4R35 with indication of hours, minutes, seconds and date. The watch features 22mm lugs and is part of the brand's Prospex diving collection. The 4R35 movement offers a power reserve of approximately 41 hours.

Frequently asked questions

What is the lug width of the Seiko Prospex Divers SRPB97?

The SRPB97 features 22-millimetre lugs. This measurement is the established standard for medium-large diameter diver watches and strictly determines which aftermarket strap is compatible. Before purchasing a replacement strap, always verify that it is manufactured for 22mm lug width, as even a 2-millimetre variance would result in imprecise fitment or physical incompatibility.

Which strap is most suitable for the Seiko Prospex Divers SRPB97?

For an instrument of such uncompromising construction, we recommend vegetable-tanned Tuscan leather in tobacco brown or black tones, which adds visual depth without competing with the watch's design language. If the watch is destined for genuine underwater use, a vulcanised rubber strap ensures resilience in saltwater environments and extreme temperatures. A military-specification NATO fabric remains the most authentic minimalist choice, particularly if you frequent marine environments where humidity is the primary adversary of traditional leather.

How do you change the strap on a Seiko Prospex Divers SRPB97?

The SRPB97 utilises simple spring bars, not screw-through pins. Obtain a spring bar tool (the small forked implement found in most horologist kits) and insert the fork terminals into the lateral grooves of the pin, then gently lift the strap. The pin will release through spring compression. Withdraw the pin completely, position the new strap (confirming it is 22mm), reinsert the pin and verify that the internal spring mechanism engages securely. Repeat on the opposite side.

Can I use an aftermarket strap on a Seiko Prospex Divers SRPB97?

Absolutely. The aftermarket offers straps of artisanal quality specifically dimensioned for 22mm lug width. The advantage of a handcrafted strap over the original Seiko lies in the range of finishes, textures and materials available—from vegetable tanning to shell cordovan leather, from vulcanised rubber to technical textiles—allowing you to personalise the watch according to your use profile and aesthetic preference.

How long does a leather strap last on an SRPB97?

A vegetable-tanned artisanal leather strap, used moderately and subjected to proper maintenance (periodic cleaning, drying after moisture exposure, light applications of natural balm), maintains structural integrity for 3–5 years of regular wear. Longevity depends on frequency of use, direct sunlight exposure and humidity levels. If your Seiko Prospex is genuinely utilised as a submarine tool watch, consider rubber coverage instead, which offers decade-spanning resilience in extreme environments without requiring maintenance.

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