1. The mechanism is in good working order, and the accuracy is suitable for everyday use. 2. There is a crack at the 10 o'clock position on the crystal; please be careful of water exposure when wearing. 3. It's a 1970s original, and the plating has aged, giving it a nice vintage feel. 4. 666 feet = approximately 200m, indicating water resistance. ※ The number "666" is associated with the beast (devil) in the Old Testament, and it is also known as the "Devil Diver."