Grand Seiko · Quartz
Strap for Quartz Stainless Steel / Black / Bracelet
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Quartz SBGX321
Selected for the 20 mm lug width · workshop selection
Vintage Black Calfskin Leather Strap€80
Hammered Calfskin Strap Light Blue€98
Hammered Calfskin Watch Strap Green with Ecru Stitching€98
Vintage Olive Green Calf Leather Watch Strap€80
Hammered Black Calfskin Strap — Ecru Stitching€98
The Quartz SBGX321, seen from the bench
Frequently asked questions
What is the lug width of the Grand Seiko SBGX321?
The Grand Seiko SBGX321 features a 20mm lug width, compatible with all standard straps of this width. The integrated lugs of the case ensure a clean transition between the watch body and strap.
What is the best strap for the Grand Seiko Quartz SBGX321?
For this model, we recommend crocodile leather in grey or dark blue for formal settings, burgundy shell cordovan for evening wear, or satin-finished calf with vegetable tanning for a versatile look. The choice depends on your use case: shell cordovan develops a natural patina over time, whilst crocodile maintains a more austere appearance.
How do I change the strap on the Grand Seiko SBGX321?
The SBGX321 uses standard 20mm spring bars. Remove the bars using a specialist tool, extract the old strap and insert the new one by sliding the bars into their respective slots. The operation takes a few minutes and is fully reversible.
Can I use a bespoke aftermarket strap?
Yes, absolutely. Milano Straps offers custom straps with bespoke measurements, choice of leathers (crocodile, calf, shell cordovan), initials and stitching thread. The Casati Milano atelier creates straps by appointment with 18-month warranty and direct WhatsApp updates.
How long does a leather strap last on a daily-wear watch?
A quality leather strap with vegetable tanning typically lasts 2-4 years in daily use. Shell cordovan boasts greater longevity thanks to the compactness of its fibres. The natural patina that develops enhances the appeal over time. To extend lifespan, we recommend rotating between multiple straps and protecting the leather from excessive moisture.
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
