Rolex Explorer II is a self-winding Swiss made wristwatch introduced by Rolex in 1971.

[1] The watch was originally intended to be a tool watch for speleologists.

[1] The fixed 24-hr bezel and bright red arrow hand (some Explorer II models also has a bright orange arrow head) were designed to keep track of day and night while caving.

[2] The Explorer line originated in honor of Sir Edmund Hillary's successful ascent of Mount Everest in 1953.

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