Seiko Prospex Quartz Professional Diver's 300m

Prospex 'Tuna' Professional 300m Divers Collection This watch shape is affectionately nicknamed by Seiko fans as a ‘Tuna’ - because of its larger diameter and bold shape like a tuna tin - loved for decades since its release. The accordion-style silicone strap combines high durability and comfort - a strap design invented by Seiko in 1975 as a practical solution to the expansion and contraction of a diver's wrist at different depths. This model features simplified indices making it easy to read underwater. Plus its case back shows the new ISO standard stating it's diver's watch capability and metre depth for saturation diving. Seiko Prospex watches are designed for sports lovers and adventure seekers  in the water, in the sky or on land. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.