Log In
Collections Sport Collection Spring Drive 5 Days SLGA001
Grand Seiko SLGA001, Spring Drive 9RA5, blue dial, titanium case, men's diver's watches
Grand Seiko SLGA001, Spring Drive 9RA5, blue dial, titanium case, men's diver's watches
Grand Seiko SLGA001, Spring Drive 9RA5
Grand Seiko SLGA001, Spring Drive 9RA5, blue dial, titanium case, men's diver's watches

Spring Drive 5 Days SLGA001

Grand Seiko Sport Collection
USD $11,100
Limited Edition of 700
Out of Stock


A professional 600m diver's watch with a next-generation Spring Drive caliber

Unveiled in 2020 by the Shinshu Watch Studio, Caliber 9RA5 is Grand Seiko’s next-generation Spring Drive movement. It's slimmer, more accurate, and has a longer power reserve thanks to a number of important updates and innovations. 

9RA5 was developed by movement designer Eiichi Hiraya. Hiraya and his team developed a new IC package featuring thermo-compensation, improving accuracy to +-10 seconds a month maximum deviation. The movement is also slimmer; an offset Magic Lever did away with about .8mm in movement thickness. To ensure robustness, the gear train was redone to fit along the central horizontal axis of the movement and locked in under a one-piece center bridge. Hiraya implemented the use of dual-size barrels on the same plane in the movement to achieve a longer power reserve. Because these two barrels are different sizes, they can fit inside the allotted area without sacrificing performance, all the while maintaining the desired thinness of the caliber and a whopping 120-hour, or five-day, power reserve.

The first watch featuring this caliber is Reference SLGA001, a professional diver rated to 600m and designed for maximum legibility. The case of SLGA001 is high-intensity titanium, which is 40% lighter than steel and more impervious to scratches. The power reserve is at the 10 o'clock position and the indicator is divided into five parts to show exactly how many days are left in the power reserve. The case, crystal, and bezel are all designed for easy and safe disassembly for the maintenance that a professional diver demands. The dial color is Grand Seiko blue, a special color that symbolizes the brand.

SLGA001 is a limited edition of 700 pieces.

Case Material : High-Intensity Titanium
Case Diameter : 46.9mm
Case Thickness : 16mm
Case Length : 50.8mm
Lug Width : 23mm
Dial Color : Blue
Crown : Screw Down
Strap/Bracelet : Stainless Steel w. three-fold clasp
Crystal : Dual Curve Sapphire
Caseback : High-Intensity Titanium
Special : Limited Edition of 700
Caliber : 9RA5
Type : Spring Drive 5 Days
Power Source : Automatic
Jewels : 38
Accuracy : ±0.5 second per day / ±10 seconds per month (average)
Duration : 120 Hours
Features : Time, Date, Power Reserve Indicator
Water Resistance : 600m
Magnetic Resistance : 4,800 A/m
Grand Seiko’s Boutique Online Services
Free 2-3 Day Shipping
2-Week Returns & Exchanges
Exclusive 6-Year Warranty
Customer Support
A tough case designed to brave all the elements.
Free 2-3 Day Shipping

Free shipping is 2-3 business days via Fed Ex Signature Required. Orders placed before 2 pm ET are generally processed and shipped on the same business day, and orders placed after 2 pm ship the following business day. Orders are processed Monday – Friday, and orders placed on Holidays will be processed the following business day. Next Day Service can be purchased for $50 and includes Saturday Delivery when applicable. Please see TERMS for more.

2-Week Returns and Exchanges

Products may be returned to Grand Seiko Boutique Online within 14 days of the delivery date. Option for a return and refund or exchange is possible when the watch is returned in new, unworn condition, with all original contents included in the package. Upon receiving your return, Grand Seiko will verify the condition of the watch. If there are any missing items, damage, or wear found, you may be subject to fees accordingly. Please be sure to remove any jewelry or other watches before trying on the watch to avoid damage.  Please do not size the watch if you return it as it will not be considered new. Please contact the Grand Seiko Boutique Online team HERE to initiate a return. Please see the TERMS for more.

Exclusive 6-Year Warranty

Warranty – All Grand Seiko watches come with a 5-year international warranty. Grand Seiko Boutiques and Grand Seiko Boutique Online provide an additional 1-year warranty at no additional charge for a total of 6 years coverage under the limited warranty. Please see the TERMS for more.

Customer Support

Email, Phone, and Live chat info:

Scheduled hours of operation are Mon-Fri 9am-6pm. However, Grand Seiko Boutique teams may be able to assist at other times depending on availability.

Email: boutique.online@grand-seiko.us.com 

Phone: 888-300-8463