Grand Seiko 9RA5 Professional Diver's 600M

~$15,302 · 1 CHF = 1.234 USD (2026-07-22)

Year

2020

Category

Plongée

Reference

SLGA001

Case

ø 46.9 mm · Titane

Material

Titanium

Dial

Blue

Movement

Spring Drive Réserve de marche: 120 h

Water resistance

600 m

Price tier

$10K–$20K

Country

🇯🇵 Japan

The Grand Seiko 9RA5 Spring Drive caliber. In 1999, Spring Drive offered the best of mechanical and electronic watchmaking technologies in a powered watch combining manual winding with a mainspring, to a diurnal accuracy of just one second, which, to this day, remains a major watchmaking innovation. The seconds hand glides with a great fluidity evocative of the fleetingness and continuity of time, so often expressed in Japanese art. This year, Grand Seiko presents a new generation Spring Drive caliber, the 9RA5, which is thinner, even more precise, and has a longer power reserve. Compared to the 9R6 caliber, the pillar of the collec