Grand Seiko · Mechanical
Strap for Automatic Hi Beat 36000 Stainless Steel / Yellow Gold / White / 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 Mechanical SBGH252
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 Mechanical SBGH252, seen from the bench
Frequently asked questions
What is the exact lug width of the Grand Seiko Mechanical SBGH252?
The SBGH252 features a lug width of 20mm, measured internally between the contact edges of the case lugs. This dimension is compatible with all standard 20mm watch straps available on the international watch market. To verify the correct measurement, use a digital calliper positioned perpendicularly to the internal lug hole, ensuring the distance between the inner edges measures exactly 20mm.
Which strap best complements the Grand Seiko Mechanical SBGH252?
For the SBGH252, we recommend Burmese alligator leather with vegetable tanning, as its natural grain beautifully dialogues with the case's Zaratsu finishing. Alternatively, British black box-calf creates a formal-elegant contrast, or brown-tobacco vegetable-tanned calf amplifies harmony with the gold case elements. The choice depends on intended use: formal for alligator, casual-elegant for calf, sporty for a 20mm nylon NATO strap.
How do I change the strap on my Grand Seiko Mechanical SBGH252?
Strap replacement is performed via the lateral attachment pins of the case. Equip yourself with a quality spring bar tool featuring a rubber tip to avoid case scratching: position the tool under the outer pin, apply gentle, constant pressure until the pin retracts slightly, extract the old strap, insert the new strap into the upper hole, compress the pin until it clicks into place. The operation requires approximately two minutes per side. For delicate wrists or high-value straps, we recommend professional assistance.
Can I use a compatible aftermarket strap on the Grand Seiko Mechanical SBGH252?
Yes, the SBGH252 accepts any 20mm lug width strap of certified quality. Milano Straps offers handcrafted straps customizable in alligator, vegetable-tanned calf, shell cordovan and other premium materials, all compatible with the case's 20mm spring bar pins. Compatibility is guaranteed by the universal spring bar system: there are no structural barriers, only aesthetic and functional choices.
What is the average lifespan of a leather strap on a Grand Seiko Mechanical SBGH252?
A premium-quality leather strap (alligator, shell cordovan, vegetable-tanned calf) on a mechanical watch with daily wear has an average lifespan of 3-5 years before the fibre begins to yield. Factors influencing longevity include wearing frequency, moisture exposure, preventive care (periodic cleaning, conditioning with pH-neutral creams), tanning quality and leather thickness. Milano Straps straps, produced with selected leathers and hand-stitched, are subject to an 18-month warranty and may be renewed at the Casati Milano atelier with contained maintenance costs.
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
