Seiko Tuna 1000M Limited Edition

The Seiko Tuna 1000M SBBN051 is a professional-grade diving watch renowned for its robust construction, reliability, and advanced technical features. As part of Seiko's esteemed "Tuna" series, the SBBN051 exemplifies superior craftsmanship and innovative design tailored for extreme underwater conditions.

Movement and Accuracy:
At the heart of the Seiko Tuna 1000M SBBN051 is the Seiko 7C46 quartz movement. This high-torque movement is specifically engineered for dive watches, offering exceptional accuracy and reliability. The 7C46 movement features 7 jewels, ensuring smooth operation and reducing wear. It operates with an accuracy of ±15 seconds per month, making it highly dependable for precise timekeeping.

Case and Crystal:
The watch boasts a monocoque (one-piece) case design, crafted from titanium with Seiko's proprietary DiaShield coating for enhanced scratch resistance and durability. The case measures 49.4 mm in diameter and 15.3 mm in thickness, providing a substantial yet comfortable wrist presence. The most distinctive feature of the case is the shroud, which offers additional protection against impacts and enhances the rugged aesthetic of the watch. The case is paired with an anti-reflective sapphire crystal, known for its superior scratch resistance and clarity.

Dial and Hands:
The SBBN051 features a black dial with large, luminous markers and hands for maximum legibility in low-light conditions. The Lumibrite coating on the hands and markers ensures long-lasting visibility, critical for underwater use. The dial also includes a day/date display at the 3 o'clock position, providing practical functionality for daily wear.

Bezel:
The unidirectional rotating bezel is a key feature for divers, allowing for precise measurement of dive time. The bezel has a knurled edge for easy operation, even with gloves, and features a luminous pip at the 12 o'clock position for enhanced visibility underwater.

Water Resistance:
True to its name, the Seiko Tuna 1000M SBBN051 is water-resistant to a depth of 1000 meters (3280 feet), making it suitable for professional saturation diving. This level of water resistance is achieved through a combination of Seiko's innovative engineering and rigorous testing.

Strap:
The watch comes with two high-quality straps, designed for comfort and durability in harsh conditions. The strap is 22 mm wide and features a stainless steel buckle for secure fastening. The silicone material is chosen for its resistance to saltwater corrosion and its flexibility, ensuring a comfortable fit during extended wear.

Additional Features:
Crown: The screw-down crown enhances water resistance and secures the internal components against external elements.
Case Back: The case back is engraved with the Seiko Prospex logo and other relevant details, ensuring authenticity and providing additional protection to the movement.

Maintenance and Care:
The Seiko Tuna 1000M SBBN051 is designed for professional use, and regular maintenance is recommended to ensure optimal performance. Battery changes should be performed by a qualified technician to maintain the watch's water resistance and accuracy. Periodic checks of the seals and gaskets are also advised, especially after prolonged exposure to extreme conditions.

Conclusion:
The Seiko Tuna 1000M SBBN051 is a formidable tool watch, combining advanced technology, robust construction, and practical features for professional divers. Its distinctive design and exceptional performance make it a standout choice for those seeking a reliable and durable timepiece for underwater adventures.