San Martin's New 37mm BB54 Vintage Diver Watch SN0138 is a compact, retro-inspired dive companion built for everyday adventurers who want a dependable mechanical diver without bulk.

With NH35 automatic movement, sapphire crystal, and 200m of water resistance, it blends classic diver aesthetics with modern reliability for both desk duty and weekend dives.

Key Features & Design

• Size & fit: 37mm case diameter for a wrist-friendly presence that still reads as a proper diver.
• Dial colors: Matte Black/Matte Blue dial options with Luminous indicators for legibility in low light (C3 Green Light/BGW-X1 Blue Light).
• Bezel: 120 Clicks Bezel: Bead Blasted Process for precise, tactile tracking of elapsed time.
• Movement: Automatic Self-Wind,NH35 [Automatic Mechanical Movement]
• Case & material: Case Material: Stainless steel,316L Stainless Steel; robust round case with a slim 13mm profile.
• Bracelet & clasp: 316L Solid Stainless Steel Bracelet with New Fly Adjustable Clasp
• Clasp: Folding Clasp with Safety
• Crystal & visibility: Sapphire Crystal with AR Coating for scratch resistance and reduced glare
• Water resistance: Water Resistance Depth: 20Bar (200m) for swimming, snorkeling, and light diving
• Screws & crown: Screw-down Crown with 3D Hexagon Logo; Screw-down Case Back for added security
• Lume: Luminous: C3 Green Light/BGW-X1 Blue Light
• Dimensions: Lug to Lug: 45.5mm; Band Length: 7.5; Band Width: 20 to 24 mm; Case Thickness: 13
• Weight: Weight: about 147g
• Model: SN0138-G
• Boxes & Cases Material: Leatherette

The San Martin SN0138 stands out with its vintage diver vibe, paired to a modern toolkit: a 316L stainless steel chassis, a sapphire crystal with anti-reflective coating, and the reliable NH35 automatic movement that’ll happily wake up when you do. It’s a watch that understands that you’re not just telling time—you’re telling a story about reliability, texture, and a little bit of rebellion against the ordinary.

Who is this for? Ideal for divers who want a compact, capable tool, watch enthusiasts who appreciate a vintage silhouette with contemporary internals, and anyone who wants a rugged daily wearer that can handle water, sun, and the occasional coffee spill without drama. If you love a 37mm footprint, a bead-blasted bezel, and sapphire that actually resists scratches, this San Martin is crafted to earn a permanent spot on your wrist.