Grand Seiko · Quartz

Strap for Quartz Anti-Magnetic Stainless Steel / Silver / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter39 mm
ReferenceSBGX291
FamilyQuartz
MovementGrand Seiko caliber 9F61 Hours, Minutes, Seconds
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 Quartz SBGX291

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Quartz SBGX291, seen from the bench

The Grand Seiko SBGX291 is a 38.8 mm stainless steel quartz watch featuring the 9F61 movement, known for its ±10 seconds annual accuracy. The model includes a 20 mm lug width, blue dial with white gold-plated indices, and a water-resistant case rated to 100 meters. Built with fine-grained stainless steel and Zaratsu finishing, it represents Grand Seiko's commitment to precision engineering and minimalist design.

Frequently asked questions

What is the lug width of the Grand Seiko Quartz SBGX291?

The lug width of the SBGX291 is 20 millimetres. This measurement represents the internal distance between the two lugs that anchor the strap to the case. To verify aftermarket strap compatibility, always measure from inside the lug using a precision tool or consult the reference number engraved on the case.

Which strap would you recommend to pair with the Grand Seiko Quartz SBGX291?

The choice depends on usage context and aesthetic preferences. For an elegant combination, we recommend alligator in vegetable tanning (medium brown or black), which creates a sophisticated contrast with the steel case and blue dial. For everyday versatility, vegetable-tanned calf maintains a balance between formality and practicality. For more sporty situations, technical rubber or shell cordovan represent excellent choices with exceptional durability properties.

How do you change the strap on the Grand Seiko SBGX291?

The SBGX291 features fixed lugs integrated into the case, meaning the strap is removable via spring bars. Use a strap removal tool (supplied with our straps) and insert it gently into the access hole on the side of the case at lug level. Push the tool to release the spring bar and extract the old strap. Repeat on the other side. To fit the new strap, align the holes with the case spring bars and insert gently until you hear a click of engagement.

Can an aftermarket strap be compatible with the SBGX291?

Yes, provided the lug width is exactly 20 millimetres. All straps designed for the 20mm lug width, regardless of material or buckle finish, are compatible with the SBGX291. We recommend always verifying dimensions during ordering and choosing artisanal straps made from superior-quality leather to ensure longevity and controlled ageing.

How long does a natural leather strap last on a watch like the SBGX291?

The lifespan of a leather strap depends on the material, usage, and maintenance. A high-quality alligator or shell cordovan strap made with vegetable tanning can last even 10-15 years if worn regularly and subjected to minimal maintenance (periodic cleaning with a soft brush, avoiding excessive moisture). A vegetable-tanned calf strap typically remains serviceable for 5-7 years. Technical rubber offers greater durability, up to 8-10 years depending on quality and UV exposure.

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