Marketed for adventurers, the Explorer family of watches was first created in the early 1950s. This sports model found great success and in 1971, Rolex launched the Explorer II as a tool watch for those who work in environments of total darkness for extended periods of time such as spelunkers (cave explorers), who needed to know if their watches indicated AM or PM . The bright, orange-colored, luminous 24-hour hand permitted the time to be read in total darkness.

The present watch is also known as the "Rail Dial" as the words "Chronometer" and "Certified" line up together. Furthermore, scholars indicate that the "sweet spot" for this dial configuration is a 5.3 million serial number, which is present on this watch.

Moreover, the backstory of this watch is as compelling as the object itself. It formerly belonged to Mike Taggett, the CEO and founder of Chums, an outdoor sporting goods store. A gift from his sister, this watch would accompany Taggett on his many adventures, ranging from building experimental engines in Argentina to sailing on Paul Cayard's America's Cup boat. This watch is accompanied by a letter from Taggett himself, chronicling the rise and subsequent decline of his storied and colorful career. Taggett sold the watch in 2009 to fund his next project, the "Human Dynamo".

Preserved in excellent condition with sharp bevels and satin finishes, this watch is not only a particularly well-preserved example, it is also a testament to the stories and memories that a timepiece can represent.