The Rolex Explorer II is a robust and reliable sports watch. Key features include: round case shape measuring 40 millimeters in diameter, black dial face with classic Rolex markers, screw-down crown for water resistance and easy winding, automatic mechanical movement providing accurate timekeeping without battery change, unidirectional rotating bezel typically used for dive timing, original manufacturer box included as part of the standard presentation, genuine papers accompanying delivery verifying authenticity, previously owned status indicating near-perfect condition assessed by experts from WRIST AFICIONADO