Seiko PROSPEX Automatic Diver's 300m GMT SPB509J

1968 Heritage Automatic GMT Diver's 60th Anniversary Limited Edition SPB509 The Prospex Heritage Diver's models follow in the footsteps of pioneering Seiko diving watches launched in the 1960s, particularly in 1965 and 1968. These important years mark milestones in the history of our diving watches. This new creation preserves the spirit of the originals while combining modern advancements. To mark the 60th anniversary of Seiko diving watches, this limited edition shines with its unique ‘Blue Wave’ dial colour and pattern. The new Heritage models are presented in a compact size, complemented by new straps for improved wearing comfort. The innovative closing system with Slide Adjuster enables more precise and convenient adjustment of the straps. At the touch of a button, without any tools. With a water resistance of 300 metres, the watches are even equipped for tough professional diving. The calibre 6R54 has a GMT function and demonstrates real stamina with a power reserve of 72 hours.