This is a Seiko Astron 5X53-0AJ0. This is a **new generation GPS solar (5X series)** model that appeared after 2018, and is a significantly improved model from the previous 8X series, making it one of the most practical watches in its class. Condition: Functionality confirmed Radio wave reception function: Functionality confirmed Other functions: Functionality confirmed Crystal: Minor scratches present. Overall, there are some minor scratches. Please refer to the photos for details. Band: Genuine Seiko product Band size: Approximately 17.5cm (Please refer to the photos) **Please note that there may be slight discrepancies between wrist size and watch band length. Thank you for your understanding.** ★★★Features: ■Ultra-fast GPS reception Significantly faster than the 8X series ■Dual time + automatic time zone Automatically adjusts to local time worldwide ■One-push time zone adjustment Time can be adjusted immediately after disembarking from an airplane ■Differences from the 8X series (important) 8X (SBXB series) → Older generation, larger, slower reception 5X (this model) → Newer generation, faster, smaller ■Glass: Sapphire (super clear) ★★★Shipping Information: To ensure the highest quality, we carefully pack and ship in a box. We generally ship via DHL or Japan Post. ※※Customs duties may be incurred upon arrival at your destination. Please be prepared to handle this. ※Regarding customs clearance, you may receive a phone call or email from your country's customs or shipping company. Please ensure you can answer the phone. We sincerely hope that your item arrives safely and that you are satisfied. Thank you for your understanding and cooperation for a smooth transaction.