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Grand Seiko
Reference: SBGA375
Product description
About this Grand Seiko watch
The Grand Seiko SBGA375 brings the angular character of the 44GS design to a 40 mm stainless-steel case. A midnight-blue sunray dial and Zaratsu-polished surfaces catch the light, giving this Heritage Collection watch a refined, distinctive presence.
Its automatic Spring Drive calibre 9R65 provides approximately 72 hours of power reserve, with an indicator on the dial and accuracy rated at ±15 seconds per month (±1 second per day). Dual-curved sapphire crystal has an anti-reflective coating on the inner surface, while a see-through screw caseback reveals the movement.
A stainless-steel bracelet with a folding clasp and push-button release completes the watch. The case measures 46.2 mm from lug to lug and 12.5 mm thick, with water resistance rated to 10 bar.
Technical details
Heritage specifications
Reference
SBGA375
Collection
Heritage
Movement
Spring Drive
Calibre
9R65
Functions
Power reserve indicator; screw-down crown; 30 jewels; accuracy ±15 seconds per month (±1 second per day); magnetic resistance 4,800 A/m
Power reserve
Approximately 72 hours (3 days)
Case dimensions
Diameter 40.0 mm; lug-to-lug 46.2 mm; thickness 12.5 mm
Dial
Midnight blue
Crystal
Dual-curved sapphire crystal; anti-reflective coating on inner surface
Case back
See-through screw caseback
Water resistance
10 bar (100 metres)
Band
Stainless-steel bracelet
Clasp
Folding clasp with push-button release
Weight
148 g
Why choose this watch
Why choose this Grand Seiko Heritage?
This reference brings together Grand Seiko's focus on precision, legibility and meticulous Japanese finishing in a design made for long-term ownership. Its spring drive movement gives it a distinct technical character, while the midnight blue dial gives this individual reference its own visual identity.
Buying details
What to know before you choose
Movement
Spring Drive, calibre 9R65.
Case and fit
Diameter 40.0 mm; lug-to-lug 46.2 mm; thickness 12.5 mm.
Dial and finishing
Midnight blue dial.
Frequently asked questions
Grand Seiko product FAQ
Is this an authentic Grand Seiko watch?
Yes. Golden Tree Jewellers is an official Grand Seiko dealer, and this watch is supplied with the presentation materials and warranty documentation provided for the specific reference.
What Grand Seiko warranty is included?
Grand Seiko provides a five-year worldwide manufacturer warranty from the date of purchase, subject to Grand Seiko’s warranty terms and exclusions. Keep the completed warranty documentation supplied with the watch.
Can I purchase this Grand Seiko online?
When the watch is available, use Add to Cart to order online or contact us for in-store availability and purchase assistance.
How should I choose a Grand Seiko movement?
Grand Seiko offers mechanical, Spring Drive and quartz movements with different ownership experiences. Review the verified movement and calibre specifications for this reference, or contact our watch specialists for guidance.
Purchase support
Shipping, returns and warranty
Shipping and in-store pickup
Free shipping within Canada on orders over $250. In-stock Canadian orders are delivered within 2–5 business days, including processing and transit. This also applies to Affirm and Flexiti orders. In-store pickup is available when offered for this item. Read our shipping policy for current terms.
Returns
Eligibility, time limits and exclusions are governed by Golden Tree Jewellers' current return and refund policy.
Grand Seiko warranty
Grand Seiko provides a five-year worldwide manufacturer warranty from the date of purchase, subject to its warranty terms. Keep the completed warranty documentation supplied with the watch.
Need help choosing?
Contact Golden Tree Jewellers for availability, sizing guidance, movement questions or an in-store viewing.
