Rolex Explorer II
A watch for cavers and polar explorers, with an orange 24-hour hand that tells day from night.
In caves and during the polar night you cannot tell whether it is day or night. The Explorer II solved this with an extra hand. The orange hand has returned in newer versions.
Materials: Stainless steel; self-winding movement
Manufacture: Made in Geneva; the bezel is fixed with a 24-hour scale.
The large orange hand that goes round once a day.
The fixed steel bezel with numerals for 24 hours.