Please see the profile. When I had a Citizen technician acquaintance overhaul the watch, the old crown was replaced. Since the technician didn't have the appropriate Citizen crown, it has a W (Wittnauer, a famous American watchmaker, known as Longines Wittnauer) mark. See photo 4. ★ The back cover has a screw structure, so it probably has some degree of water resistance, but it's best to be careful around water. The Citizen technician said that the C-marked screw-type Citizen watches are rare. ★ The accuracy was observed for only 6 hours, and it was running 30 seconds slow. It will fluctuate depending on the wearing position, but it's at a level that's fine for everyday use. ★ I own many watches, so I rarely wear this one. The stains on the dial due to aging were present from the beginning and haven't changed since. ★ The band length is about 12cm. It's an expansion type, so it can accommodate various wrist sizes. It's not new, but it has been cleaned with ultrasonic cleaning and is clean. Approximate size (mm) Diameter: 33, Length: 40 (lug tip to lug tip), Lug width: 17.5 No returns or claims accepted.