Look at the side of it first
By Tom Hargreaves, Falmouth, Cornwall ยท
16.1 mm thick. That's the number that matters with the Planet Ocean 600M, and I'd tell anyone to look at it side-on before they look at the dial.
It's a serious watch: 43.5 mm, 600 m, the Co-Axial 8900 with 60 hours, helium valve, steel bracelet, $7,500 to $8,000. Dial and bezel are clear and the lume is strong. But it's tall, it's heavy, and it sits up like a hockey puck under a cuff. Under a wetsuit, fine. Under a shirt, forget it.
For the boat, I'd consider it. For everything else, the Seamaster 300M is the better watch.