This is a high-performance timepiece from SEIKO's flagship Astron collection, reference 5X53-0AV0 (often marketed under model numbers like SBXC063, depending on the specific color/trim). This model belongs to the advanced 5X Series, which features SEIKO's most refined GPS Solar technology, engineered for the global traveler. Model Series: SEIKO Astron Global Line Sport. Reference: 5X53-0AV0 (Case/Movement Reference). Movement: SEIKO Caliber 5X53 GPS Solar. GPS Controlled: Adjusts the time zone and time precisely anywhere in the world by connecting to the GPS satellite network. Solar Powered: Takes all its energy from light (Solar), eliminating the need for battery changes. High-Speed Time Zone Adjustment: The 5X series is celebrated for its ability to switch between time zones remarkably fast (in as little as 3 seconds). Super Smart Sensor: Automatically adjusts the time daily when detecting sunlight. Design & Features: Material: The case and bracelet are made of Titanium, offering superior lightness, robustness, and comfort compared to steel. Dual-Time Function: Displays the home time and local time simultaneously, with an easy "time transfer function" to switch them instantly. Perpetual Calendar: Correct until the year 2100. Water Resistance: Typically rated for 10 Bar (100M) or 20 Bar (200M) in the Sport line, offering robust protection (check specific model number for exact rating). Crystal: Features a Dual-curved Sapphire Crystal with Super-Clear Coating, ensuring high scratch resistance and outstanding legibility in all lighting conditions. LumiBrite: Applied to the hands and indices for excellent visibility in the dark. [ Appearance ] Scuffs from normal use. *Please check photos. [ Functional ] It works properly. Quick set(Date) : work well. [ What's included ] Only what is shown in the photos. Please understand. Total condition is subjective, so please judge to the pictures for more details. Please check the pictures and don't hesitate to ask any questions about the item! [ Shipping ] I send a product by DHL or EMS. I attach the tracking number. Please bid it without worrying. Shipping is available from Monday to Friday. Weekends are not available because office is closed. [ International Buyers ] Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. Please look at the pictures carefully to make a decision. We sell the item as described on the listing but some items are old watches so If the item is a QZ watch, then if it becomes out of battery on the way to your hand, please replace the battery by yourself. (we are basically selling working product.)