Explorer II

The Rolex Explorer II has built its reputation as the tool watch of choice for adventurers, particularly those venturing into caves or polar regions where distinguishing day from night can be a challenge. Introduced in 1971, the model evolved with the reference 216570, which debuted in 2011 to mark the Explorer II’s 40th anniversary. This version features a bold 42mm case, an orange 24-hour hand echoing the original 1655 “Freccione,” and a fixed steel bezel — a combination that sets it apart within the Rolex professional lineup.

Key differences among Explorer II references drive collector interest and pricing. The 216570 stands out for its larger case and the use of the caliber 3187 movement, offering independent local hour adjustment and enhanced shock resistance. Earlier references like the 16570 (40mm, caliber 3185/3186) are slimmer and have a slightly different dial layout, while the much-loved 1655 commands a premium for its vintage appeal and distinct hand set. Condition, dial color (black or white “Polar”), and presence of box and papers all influence value, with the white dial often fetching a modest premium.

When considering a 216570, check for full bracelet links, crisp bezel engravings, and smooth operation of the independent hour hand — these details affect both wearability and collectibility. The Explorer II’s 100m water resistance and robust automatic movement make it a practical daily wearer, but its unique history and rising demand mean examples in excellent condition are increasingly sought after. Expect price variation based on service history, dial color, and overall originality, especially as the model transitions to the newer reference 226570.