I found this wristwatch while sorting through my belongings. It's a Seiko Gyro Marvel, Full Winding, Automatic, as written on the back. The hands move when shaken, but it stops after a while. The appearance is as shown in the photos, and it's quite old, so I think it might have some antique value. The crown can be used to wind and set the time. The cover on the face has some cracks and scratches. It's probably not reinforced plastic from back then. The band is missing the clasp. There's a dent on one part of the back cover. I recommend it as an antique collection piece.