Product Overview
The San Martin Men Watch SN0139 is a precision automatic mechanical diver’s watch designed for men who value both performance and style. Built around the reliable NH38 movement, this timepiece delivers consistent accuracy and durability for everyday wear and underwater adventures. With a 39 mm stainless steel case and a 20 bar water resistance rating, it’s engineered to perform at depths of up to 200 meters. Ideal for diving enthusiasts, outdoor adventurers, or anyone seeking a robust luxury watch, the SN0139 combines functional diving features with a refined aesthetic. 


Key Features
- Automatic Mechanical Movement (NH38): Powered by the self-winding NH38 caliber, this watch eliminates the need for batteries by harnessing motion from the wearer’s wrist. As long as it’s worn regularly, the watch stays wound and ready. The movement features a smooth sweeping seconds hand and maintains reliable timekeeping, making it a dependable choice for daily wear. The absence of a date complication simplifies the dial layout, offering a clean and symmetrical appearance appreciated by many mechanical watch enthusiasts.
- 20 Bar Water Resistance: Rated for 20 bar (equivalent to 200 meters), this watch is suitable for recreational diving, swimming, snorkeling, and other water-based activities. The screw-down crown enhances sealing integrity by creating a watertight barrier, ensuring protection against water ingress during submersion. This level of resistance makes it appropriate for surface swimming, boat trips, and shallow dives, though it is not intended for high-pressure technical diving or prolonged deep-sea use.
- 39 mm Stainless Steel Case: The case size is thoughtfully designed to balance classic proportions with modern wearability. At 39 mm in diameter, it fits comfortably on most wrist sizes without appearing oversized or too delicate. Crafted from durable stainless steel, the case resists corrosion from saltwater and daily exposure to moisture. Its polished and brushed finishes add visual texture and depth, contributing to a premium, well-crafted appearance.
- Stainless Steel Bracelet: The integrated bracelet is constructed from the same high-quality stainless steel as the case, ensuring uniformity in material and finish. It features a combination of polished center links and brushed outer links, creating a dynamic contrast that enhances its visual appeal. The bracelet includes a secure clasp mechanism for a snug and comfortable fit, suitable for extended wear during active use or daily routines.
- Diver-Ready Design: Engineered with essential diving functionality, the watch includes a unidirectional rotating bezel that allows divers to track elapsed time underwater—a critical safety feature. The bezel rotates with precise, tactile clicks and is marked with clear, legible numerals and indices. Luminous material is applied to the hour markers, hands, and bezel pip, enabling visibility in low-light environments such as murky water or nighttime conditions.
- Scratch-Resistant Crystal: The dial is protected by a durable crystal designed to resist everyday scratches and minor impacts. This helps maintain the watch’s clarity and legibility over time, even with regular exposure to active environments. While not completely immune to damage, the crystal provides reliable protection for typical daily wear and light outdoor use.



Technical Specifications
- Model Number: SN0139-Stainless-Steel-Bracelet
- Department: Men
- Movement: Automatic Mechanical (NH38)
- Case Diameter: 39 mm
- Water Resistance: 20 Bar (200 meters)
- Case Material: Stainless Steel
- Bracelet Material: Stainless Steel
- Package Dimensions: 5.91 x 5 x 3.94 inches
- Item Weight: 3.53 ounces
- Manufacturer: San Martin
- ASIN: B0CT244L6K
- Date First Available: January 23, 2024



Benefits & Use Cases
The San Martin SN0139 is built for men who demand reliability in challenging environments. Its 20 bar water resistance and automatic movement make it a trusted companion for divers, snorkelers, and water sports enthusiasts. The watch performs reliably during surface swimming, boat excursions, and shallow dives, while its robust construction withstands daily wear and exposure to moisture. The 39 mm case size ensures a balanced fit on most wrist sizes, making it suitable for both casual and semi-formal occasions. With its luminous dial elements and rotating bezel, it’s particularly useful for tracking time during underwater activities or low-light conditions. The stainless steel bracelet offers all-day comfort and pairs well with both active and professional attire.
Important Notes
While the watch is rated for 20 bar water resistance, it is not recommended for high-impact water sports or deep technical diving beyond recreational limits. Avoid pressing buttons or adjusting the crown while submerged, as this can compromise the water resistance. Regular maintenance, including periodic pressure testing and seal inspection, is advised to preserve water resistance and movement performance over time. The package includes the watch only; additional accessories, tools, or warranty cards are not specified in the product details. For warranty information, customers should refer to the manufacturer’s official policy. This model was first made available on January 23, 2024, and carries the ASIN B0CT244L6K for identification. With a Best Sellers Rank of #4,347 in Men’s Wrist Watches, it reflects growing popularity among buyers seeking quality automatic dive watches. Customer reviews average 4.6 out of 5 stars based on 37 ratings, indicating strong user satisfaction with its design, functionality, and value.