This is the Seiko 4M21-0A30. This is a watch from the Dolce AGS (Automatic Generating System) series. It features an automatic winding generating system, now known as Kinetic. Manufactured in the 1990s. Condition: Working. There are some minor scratches, but overall it is in relatively good condition. Please see the photos for details. ■Band Size: Approximately 16.5-17cm (Please refer to the images) ※※There may be slight differences in wrist size and watch band length. Thank you for your understanding. ★★★Key Features: ■Movement: Caliber 4M21 is a unique quartz watch system called AGS (now Kinetic). ■Power is generated by shaking the watch, and the energy is stored in the Kinetic E.S.U. (Energy Storage Unit). ■Material: Titanium case. ■Design: As part of the Dolce series, it features an elegant design. ★★★Shipping Information: To ensure the highest quality, your item will be carefully packed and shipped in a box. We generally ship via DHL. ※Please note that customs duties may be incurred once the item arrives in your local area, so please be aware of this. ※Your country's customs or shipping company may contact you by phone or email regarding customs clearance. Please make sure you can answer the phone. We sincerely hope that your item arrives safely and that you are satisfied with it. We appreciate your understanding and cooperation in order to ensure a smooth transaction.