This is the Grand Seiko Diver’s watch powered by Spring Drive Calibre 9RA5 which offers an accuracy rate of ±10 seconds per month and a five day power reserve. It is made from High-intensity Titanium, a material that is 30% lighter than stainless steel and even more impervious to scratches and corrosion. To further enhance its durability, the rotating bezel is in ceramic to protect the watch from being scratched.
The dial is deep black in colour and has a strongly patterned surface, inspired by a particular aspect of the oceans that surround the Japanese archipelago and that are criss-crossed by water currents of great power. One such is the Kuroshio Current, also known as the Black Stream. It flows northwards past Japan towards the Arctic North Pacific and is one of the largest ocean streams in the world. The dynamic and sometimes violent tides caused by the Black Stream inspire the deep black colour and richly textured surface of the dial of this new 200m diver’s watch.
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Distance Between Lugs: mm
|Band/Bracelet:||Bracelet - Titanium|
|Dial Colour:||Black Textured|
|Hand Indicators:||Hour, Minute, Seconds|
|Calibre no.:||9RA5 Instructions|
|Movement Type:||Spring Drive - Powered By The Movement of the Wearer|
|Accuracy:||±0.5 second per day (±10 seconds per month)|
|Battery Life:||120 Hours Power Reserve|
|Water Resistance:||Divers 200 Metres|
|Other details / Features:||
In 2020, Grand Seiko introduced a new design philosophy called the Evolution 9 Style. It was based, of course, on the Grand Seiko Style which has always defined the design of all Grand Seiko watches and continues to do so. The Evolution 9 Style preserves the fundamentals of the Grand Seiko Style but adapts them for a new generation by setting new standards of legibility, comfort and beauty.
Ever since its creation in 1960, Grand Seiko has evolved continuously as new technologies, materials and ideas have opened up new design possibilities and the Evolution 9 Style is another step forward on this never-ending road. It was developed to further refine the aesthetics that have been at the heart of Grand Seiko from the start and to renew them for the years to come.
The legibility could not be greater, thanks to the high contrast between the dial and hands, the precision of the engineering and the generous coatings of Lumibrite that the hands and the markers carry. Furthermore, each hand has its own distinctive shape, as does the 12 o’clock marker, so that the exact time can be read at a glance, even under water.
Spring Drive is a unique watch technology. It generates energy like every other traditional mechanical watch but combines this with an electronic regulator to deliver a level of precision that no mechanical watch can match. The development of Spring Drive was possible because Grand Seiko is one of the very few manufacturers with mastery of both electronic and mechanical watchmaking.
In addition to achieving a high accuracy of ±10 seconds/month, this movement is 0.8mm thinner than the previous Calibre 9R65 by adopting the “Offset Magic Lever.” The movement is equipped with a power reserve indicator located on the dial side for safety during diving.
One of the world's foremost mechanical movements, the culmination of high-precision micro-engineering and the attention to detail of Seiko's expert watchmakers.
Spring Drive is a unique movement that delivers one-second-a-day precision, using just the power of a mainspring.