This is a TUDOR OYSTER manual-winding wristwatch. I believe it's from around the 1940s. It has the shield and rose emblem, a domed crystal, a small seconds dial, and a nicely aged dial, giving it a great atmosphere. The strap is a later addition. It has scratches and other signs of wear appropriate for its age, but it is currently working without any problems. I don't have any specialized knowledge of watches, so I would appreciate it if you could judge from the images. If you have any questions, please feel free to ask in the comments, and I will answer to the best of my ability.