Grand Seiko

Stainless Steel SBGR309

Reference Number :

SBGR309

Series : Heritage

Retail: $4,600

(As of: 01/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Grand Seiko. If you are interested in selling this watch to us, you can contact us here.

Quick TakeThe Grand Seiko SBGR309 from the Heritage Collection is a testament to the brand's unwavering dedication to both form and function. Its robust stainless steel case houses the venerable Caliber 9S68 automatic movement. With a 72-hour power reserve, this movement is not only a workhorse but a thoroughbred, promising precision with a daily rate variance that will satisfy the most demanding of watch nerds. The see-through case back offers a glimpse into the mechanical ballet, a constant reminder of the craftsmanship that ticks away within. With its clean lines and functional elegance, the SBGR309 channels a design ethos of functional beauty. This isn't just another pretty face; it's a companion ready to stick with you through thick and thin, day in and day out, all while quietly exuding an aura of understated luxury that only a true Grand Seiko can muster. It is a watch that balances form and function without being overly showy.

DescriptionThe Grand Seiko Heritage Collection model SBGR309 is constructed with a stainless steel case that measures 42.0mm in diameter, 47.9mm in lug-to-lug length, and 13.1mm in thickness. The case is paired with a matching stainless steel bracelet featuring a three-fold clasp with a push-button release, accommodating a maximum perimeter of 205mm. This bracelet contributes to the watch's overall weight of 173 grams. The case back is a see-through screw-down design, providing a view of the internal movement. Protection for the watch face is offered by a dual-curved sapphire crystal, treated with an anti-reflective coating on its inner surface to enhance visibility. This model is designed to withstand water pressure up to 10 bar, indicating suitability for surface swimming and snorkeling, but not high-impact water sports or diving. It is also equipped with magnetic resistance up to 4,800 A/m, offering protection against common magnetic fields.

At the heart of the SBGR309 is the Caliber 9S68, an automatic movement that also supports manual winding. The movement incorporates 35 jewels and offers a power reserve of approximately 72 hours, or 3 days, allowing the watch to continue running without being worn for an extended period. The 9S68 achieves a high level of accuracy, with a mean daily rate variance between +5 to -3 seconds per day. This rate is determined by measuring the movement's performance across six positions under controlled conditions over 12 days. The movement's precision is further enhanced by incorporating Grand Seiko's latest hairspring technology and an escapement developed using Micro-Electro-Mechanical Systems (MEMS) technology. This advanced engineering ensures stability and accuracy in timekeeping. Furthermore, the watch features a screw-down crown.

GenderMen

SignaturesGrand Seiko

Country of OriginJapan

Case Size42 mm

MovementAutomatic

Caliber9S68

FunctionsHours, Minutes, Seconds, Date

Power Reserve72 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSapphire Crystal