The Seiko Tuna dive watch, also known as the Seiko Marinemaster Tuna, is a highly respected and sought-after timepiece within the dive watch community. It was first introduced in 1975 as a professional-grade diving instrument designed to withstand the extreme conditions of deep-sea diving.

The Tuna's unique design is characterised by its large, cushion-shaped case, which is made from a special alloy called "Monaco metal" that is resistant to corrosion. The watch also features a distinctive "can" or "tuna can" shape on the case back, which was added to protect the watch's movement from magnetic fields.

One of the most notable features of the Tuna is its incredible water resistance. The watch can withstand depths of up to 600 meters (2000 feet), making it suitable for even the most demanding professional divers. Additionally, the watch is equipped with a unique "Magic Lever" winding system, which allows the watch to be wound quickly and efficiently, even while wearing gloves.

Over the years, Seiko has released several versions of the Tuna, each with its own features and technical specifications. Some of the most popular models include the Seiko Tuna SBBN031, which features a titanium case and a black dial, and the Seiko Tuna SBBN035, which has a stainless steel case and a blue dial.

Despite its age, the Seiko Tuna remains popular among divers and watch enthusiasts, thanks to its rugged durability, excellent water resistance, and timeless design. Whether you're a professional diver or watch enthusiast, the Seiko Tuna is a timepiece that will impress you.

The Seiko Tuna dive watch typically uses a Seiko mechanical movement, specifically the 8L35, or a quartz movement, like the 7C46. The 8L35 is an automatic movement with a power reserve of 50 hours, which is considered high-end calibre and is equipped with Seiko's Diashock and Spron alloy mainspring. The 7C46 is a quartz movement known for its accuracy, durability and long battery life.

When looking to purchase a Seiko Tuna dive watch, be sure to visit Seiko Premier Retailer Christies Jewellery and Watches Papatoetoe.

It's worth noting that different versions of the Seiko Tuna may have different movements, but these are the most common ones. It's always recommended to check the specific model you are interested in to know the exact movement.

When looking to purchase a Seiko Tuna dive watch, be sure to visit Christies Jewellery and Watches at Hunters Plaza in Papatoetoe, Auckland. Our knowledgeable customer support team will be happy to assist you in finding the perfect Seiko Tuna for your needs. We carry a wide variety of Seiko Dive watches, including limited edition models, so you are sure to find something that you will love