Precision Engineering Meets Deep-Sea Performance. More than just a timepiece, Model 390 is a high-performance instrument built to withstand the pressures of the deep while keeping you on track across time zones:

True GMT Capability: Powered by the Japanese Seiko NH34 automatic movement, allowing you to track two time zones simultaneously—perfect for international exploration.

Deep-Sea Readiness: Equipped with a professional Automatic Helium Escape Valve, essential for decompression during saturation diving.

Extreme Durability: Forged from surgical-grade 316L Stainless Steel with a scratch-resistant Sapphire Crystal, ensuring clarity and integrity at depths up to 300 meters (30 ATM).

Elite Visibility: Coated with genuine Swiss BGW9 Super-Luminova, providing a brilliant, long-lasting blue glow for perfect legibility in the darkest abyss.

Professional Fit: Features a solid stainless steel bracelet with an on-the-fly adjustable clasp, allowing for a perfect fit over a thick wetsuit.

10 Years of OEM Mastery: Leveraging a decade of experience serving top-tier US diving watch brands, Supertime ensures every watch passes rigorous pressure and accuracy tests.

Premium Finishing: Meticulously brushed and polished surfaces reflect the high standards required by professional diving companies.

Partner with an Expert Manufacturer.Available for private label (OEM) and wholesale orders. Contact us today for a full technical specification sheet and bulk pricing.