The Rolex Explorer II, a robust and reliable tool watch born from the rigors of exploration, has captivated adventurers and horology enthusiasts alike for decades. Its iconic design, coupled with its unwavering performance, has solidified its place as a legend in the world of timepieces. However, understanding the evolution of the Explorer II requires more than just appreciating its aesthetic changes; it necessitates a deep dive into the heart of the watch: its movement. This article explores the fascinating history of the calibres powering the Rolex Explorer II, tracing its evolution from its inception to the present day. We will explore the key movements, their features, and their impact on the watch's overall performance and legacy.
Rolex Explorer II History: Setting the Stage for Calibre Evolution
Before delving into the specifics of the movements, it's crucial to understand the context of the Explorer II's development. Introduced in 1971, the Explorer II was designed as a tool watch for spelunkers and other explorers who required a watch capable of withstanding harsh conditions and providing reliable timekeeping in challenging environments. Its distinctive features, including the fixed 24-hour bezel, were crucial for distinguishing day from night in low-light conditions, a critical function for those venturing into caves or navigating polar expeditions. The initial models reflected this utilitarian design philosophy, with a focus on functionality and durability. This foundation laid the groundwork for the evolution of the movements within the watch, each iteration reflecting advancements in Rolex's horological expertise.
Rolex Explorer II Models and their Corresponding Calibres:
The history of the Explorer II is marked by relatively few significant design overhauls compared to some other Rolex models. However, the changes in the movements are substantial, reflecting Rolex's ongoing commitment to innovation and improved performance. Let's examine the key models and their associated calibres:
* Reference 1655 (1971-1984): The original Explorer II, reference 1655, was powered by the Calibre 1570. This automatic movement, with a 27-jewel configuration, boasted a robust construction and a frequency of 18,000 vibrations per hour. While not possessing the same level of accuracy as later movements, the Calibre 1570 proved reliable and durable, perfectly suited for the arduous conditions the Explorer II was designed to withstand. It featured a hacking seconds function, allowing for precise time setting. The 1655 is highly sought after by collectors today, representing the genesis of this iconic watch.
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