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Grand Seiko Evolution 9 Collection SLGB025

SLGB025
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The “Ushio 300,” a Spring Drive diver’s watch with phenomenal accuracy and a stunning green dial. In 2025, Grand Seiko unveiled the Spring Drive Caliber 9RB2, a groundbreaking movement that received the then-new U.F.A. designation, standing for “Ultra Fine Accuracy.” Boasting an annual accuracy rate of ±20 seconds, Caliber 9RB2 earned the distinction of being the most accurate wristwatch movement powered by a mainspring.* This model is powered by Caliber 9RB1, featuring an improved construction that makes it ideal for sporting conditions while sharing the same attributes as the Caliber 9RB2. The term ushio, which means “tide” in Japanese, evokes the waters that surround the Japanese archipelago. The green dial draws from the tranquil beauty of shallow coastal waters near the shore. * As of April 2026, based on Grand Seiko’s research.
Case Stainless steel
Case Size 40mm
Movement Automatic
Dial Green
Power Reserve 72 hours
Water Resistance 10 bar
Bracelet Stainless steel
Warranty 5 Years

Shipping

  • Complimentary Two-Day Shipping on purchases over $100. Order processing can take up to 3-5 business days.

  • We currently only ship domestically within the United States. Orders ship Monday through Thursday, excluding public holidays, via standard overnight service with signature required, per our insurance policy. Shipping delivery must be confirmed by the recipient in order to ship out the order. If a package is undeliverable and returned to us, additional shipping charges may apply for reshipment.

  • Shipping fee for watch straps and accessories is flat $35. Please note: all watch parts are FINAL SALE.

Inspection Upon Delivery

Please carefully inspect your package at the time of delivery. If the outer packaging appears damaged, opened, resealed, punctured, or otherwise tampered with, we kindly ask that you refuse delivery. Please inform the carrier that you are declining the shipment due to suspected damage or tampering.

If possible, take clear photographs of the package—showing the condition of the box, shipping label, and any visible damage or broken seals—before returning it to the carrier.

Please note that by accepting the package, you acknowledge that the outer box appears intact and untampered with at the time of delivery.

Exchanges & Store Credit

  • Eligible items may be exchanged or returned for store credit within 3 business days of receipt. No refunds.

  • To request an exchange or store credit, contact Customer Service at customerservice@chpremier.com or reply to your confirmation email to initiate the process.

  • Items marked “Final Sale”, including all watch parts, promotional/discounted merchandise, and financed purchases (e.g., Affirm, Shop Pay Installments), are not eligible for return, exchange, or store credit. 

  • Returns due to change of mind or buyer’s remorse will not be accepted.

  • Merchandise must be in original, unworn condition, with the protective blue tag attached. Items showing signs of wear, alteration, or damage will not be accepted.

  • A shipping and restocking fee applies to all approved returns/exchanges.

  • We reserve the right to refuse any return that does not meet the above requirements.


Our online policies may differ from our in-store policies. The above terms apply only to online purchases. 

Grand Seiko Evolution 9 Collection SLGB025
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