Grand Seiko has revealed what it claims to be the most accurate mainspring-powered watch ever made at Watches and Wonders.

Already Seiko’s highest-performing dive watch, with a 600m dive rating vetted ... The stainless steel bezel is coated with a “diamond-like carbon” that makes it six times harder and more ...

In short, the Tentagraph is a confident release from Japan’s most inspired watchmaker. For a brand so deeply associated with ...

From Mount Iwate-inspired designs to diamond-set masterpieces, the brand highlights its dedication to artistry and ...