The watch in the image is a vintage Seiko 5 Automatic men's wristwatch (featuring a 7S26 or 7009 movement) that stands out with its retro design and a rare, collectible vibrant yellow dial. Mechanism: It features an automatic mechanical caliber. It self-winds using kinetic energy (from arm movements) and requires no battery. The dial bears the "21 Jewels" marking; these jewels reduce friction within the mechanism, thereby enhancing the watch's longevity and precision. Case and Bracelet: Features a durable stainless steel case and a matching integrated steel bracelet design. It is designed with a striking, vibrant yellow background. Small numerals from 1 to 12, indicating the hours, appear on the inner part of the dial, while large minute markers ranging from 5 to 55—reminiscent of aviation or military (pilot) styles—feature on the outer part. Calendar (Day-Date): Displays for both the day (day of the week) and the date (day of the month) are located at the 3 o'clock position.Case Diameter: Approximately 36 mm – 37 mm (standard size for a classic vintage Seiko 5).• Crown: True to the classic design of the Seiko 5 series, it is positioned at the 4 o'clock mark to ensure it does not cause discomfort to the wrist. Vintage models with yellow dials like this offer an aesthetic appeal suitable for casual sporty or retro outfits and are highly popular among watch collectors.