1. The mechanism is fine, and the accuracy is good enough for everyday use. 2. It's a shame there's a scratch on the crystal around the 10 o'clock position. 3. The peeling plating, which was on the original from the '70s, adds to the taste. 4. 666 feet = approximately 200m, indicating water resistance. ※ The number "666" is associated with the beast (devil) in the Old Testament, hence the nickname "Devil Diver."