First released in 1971, the Explorer II carries the qualities of the Explorer as a reliable companion for adventurers but brings its own values to the model, after undergoing an extensive aesthetic and technical makeover in 2011 for its 40th anniversary. The signature feature of this new version is a larger, orange 24-hour arrow-shaped hand; this function is invaluable to adventurers in distinguishing from day and night in environments such as Polar Regions where the sun never sets or amidst the darkness of caves where there is no natural sunlight. This stainless steel automatic 16570 model comes with a year warranty.