San Martin San Martin BB54 Vintage Diver SN0138G
$238Sold out
Case
- Diameter
- 37mm
- Thickness
- 13mm
- Lug width
- 20mm
- Material
- Stainless Steel
- Water resistance
- 200m
Crystal & dial
- Crystal
- Sapphire
Movement
- Caliber
- Seiko NH35
- Type
- Automatic
Seiko
Seiko's third-party supply version of the 4R35, sold to external watch brands and modders worldwide. Adds hacking and hand-winding over the 7S26 it effectively replaced. The NH35 has become the default automatic movement for watch modding and microbrand watches, thanks to its low cost, reliability, and wide availability of compatible parts including dials, hands, and cases in the Seiko-compatible format.
Design language
- Case shape
- round
- Dial style
- matte
- Bezel
- rotating
- Bracelet
- lug-attached
- Hands
- baton
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3 colorways
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Retail$238
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Owners widely praise the San Martin BB54 Vintage Diver SN0138G for its exceptional finishing and value, with many highlighting the comfortable 37mm case size and excellent bracelet featuring screw links, SEL fitment, and an on-the-fly adjustable clasp. The lume is consistently noted as impressive, lasting for hours, and the 120-click bezel action is described as premium with perfect alignment, though one owner found the teeth sharp. Some owners express a desire for a thinner case or a higher beat movement than the NH35, and one noted the case measured 38mm instead of 37mm. On balance, owners rate the San Martin BB54 Vintage Diver SN0138G highly for its premium feel and wearability at its price point.
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