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Dapper divers: Seiko launches first Prospex GMT diver’s watch in two salty colourways

Seiko Prospex GMT divers watches side by side in Marine Green and Darkest Depth colourways

Seiko has introduced a new Prospex diver’s watch in two colourways, the Seiko Prospex ‘Dark Depths’ GMT and the Seiko Prospex ‘Marine Green’ GMT. It’s the latest re-interpretation of the brand’s trend-setting 300M hi-beat dive watch, introduced in 1968.

The success of that timepiece laid the foundation for Seiko diving watch development for decades to come.

This fashionable new iteration boasts the new in-house 6R54 calibre which enables mechanical GMT functionality, displaying a second time zone, a first for Seiko dive watches. This new calibre also allows for calendar-date and a stop second hand functionality.

The success of that (1968) timepiece laid the foundation for Seiko diving watch development for decades to come…

Highly durable, in line with the Seiko Prospex philosophy, these non-limited timepieces have a three-day power reserve and high-quality scratch resistant Japanese ceramic diving scale.

Automatic with manual winding, and a three-day power reserve, the new Prospex divers have a stainless steel, unidirectional rotating bezel. 

The case diameter is 42mm, with a thickness of just 12.9mm. The sapphire crystal has an anti-reflective coating on the inner surface.

On the Dark Prospects GMT, the dial is black, while the Marine Green dial looks, appropriately enough, oceanic. Lumibrite decorates hands, indexes and bezel. 

Whether braving the depths of the ocean (or more precisely 200m down) or gracing the wrists of discerning collectors, this affordable new Prospex dive watch is well worth splashing out on. 

The Seiko Prospex GMT diver’s watch is available to buy now, priced at £1,400.  

Mayfair marina: Sanlorenzo Yachts to open London flagship showroom on Park Lane

One of the world’s leading bespoke shipyards is setting up shop in the heart of London.  Sanlorenzo Yachts UK will open a flagship showroom at 61 Park Lane, Mayfair, in March 2026.  Designed as a working studio rather than a traditional retail space, the showroom will allow prospective Sanlorenzo owners and charter clients to begin…