Thank you for your interest. This is a wristwatch that my wife owned. ☆ Manufacturer: SEIKO ALBA ingénu ☆ Year of purchase: Unknown ☆ It was sleeping in the back of a drawer. ☆ Approximately 16mm in diameter, it feels more like a bracelet than a watch. ☆ Remarks: No particular problems with the operation of the crown. Since it has stopped working after the battery died, please replace the battery.