Grand Seiko · Spring Drive

Strap for Spring Drive Titanium / 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
ReferenceSBGA279
FamilySpring Drive
MovementGrand Seiko caliber 9R65 hours, minutes, seconds | date | power reserve indicator
Year2017
CaseTitanium

Spring bar

Swiss Standard universal spring bars

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

Straps for the Spring Drive SBGA279

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Spring Drive SBGA279, seen from the bench

The Grand Seiko Spring Drive SBGA279 features a 39.40 mm titanium grade 5 case with a 20 mm lug width. It houses the caliber 9R65 Spring Drive movement, renowned for its smooth seconds hand glide and magnetic oscillator technology. The watch offers 100 meters water resistance and a 72-day power reserve.

Frequently asked questions

What is the lug width of the Grand Seiko Spring Drive SBGA279?

The lug width of the Grand Seiko Spring Drive SBGA279 is exactly 20 millimetres. This undersized dimension relative to the 39.40mm case diameter ensures harmonious proportions on the wrist and allows easy integration of aftermarket straps. Always verify that your chosen strap measures precisely 20 millimetres at the lugs to avoid lateral play.

What is the best strap for the Grand Seiko Spring Drive SBGA279?

The optimal strap depends on intended use. For formal contexts, dark brown alligator or vegetable-tanned cognac calf leather enhance the minimalist elegance of the model. For versatile daily wear, grey-brown aged calf or shell cordovan guarantee durability exceeding 10 years with patina that improves over time. For occasional water exposure, FKM rubber or nylon NATO remain irreplaceable.

How do you change the strap on a Grand Seiko Spring Drive SBGA279?

Changing the strap on the Grand Seiko SBGA279 is straightforward: obtain a spring bar removal tool with two forked ends. Position the tool inside the lower lug and push upward to compress the internal spring, then extract the pin. Repeat for the upper lug. Insert the new strap by aligning the holes at its extremity with the pins, then push gently until you hear a click indicating secure locking. Verify proper attachment before wearing.

Can I use an aftermarket strap compatible with the Grand Seiko SBGA279?

Yes, any strap with a 20 millimetre lug width is completely compatible with the Grand Seiko SBGA279. Artisanal aftermarket straps crafted from genuine alligator, vegetable-tanned calf, shell cordovan, or technical rubber fit perfectly onto the Seiko attachment pins without any modification. Choosing aftermarket straps allows superior aesthetic and functional personalisation compared to original Seiko straps.

How long does a leather strap last on a Grand Seiko Spring Drive SBGA279?

Leather strap durability depends on leather type and intensity of use. A vegetable-tanned calf with moderate daily use maintains structural integrity for 4-6 years, developing fascinating patina. Shell cordovan, a denser and more fibrous material, easily surpasses 10 years of intensive daily use. Alligator leather, due to its natural density, reaches 7-9 years durability with regular maintenance. Frequent exposure to humidity, heat, and sunlight accelerates ageing: apply organic conditioners annually to substantially extend strap lifespan.

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