3 Answers

....saw some at Walmart.

The Tuna comes packing a brilliant L-shaped rubber gasket that keeps helium out. The in-house 8L35 movement is made by link Grand Seiko in link its legendary SII facility in Morioka. The 26-jewel, 50-hour power reserve, 28,800 bpm 8L35 is essentially an un-bedazzled 9S55. Remember, it's a monocoque link case with no display, so you'll never see the movement anyhow.

When I put the Deepstar 39mm on a NATO it felt as link though the strap made the case feel much thicker and more top-heavy on my wrist. Switching link back to the included Tropic rubber the difference is remarkable and it highlights just link how much a specific strap can help to manage the way a watch interacts with your wrist and manages its own bulk. The rubber wears flat and comfy on my wrist while also perfectly suiting the overall style of the Deepstar.