The Rolex Explorer II, a tool watch designed for explorers and adventurers, boasts a rich history marked by significant design evolutions. While the modern iterations are readily available, certain vintage models, particularly those produced in the early years of the reference 1655 and its successor, the 16570, hold a special allure for collectors. This article delves into the fascinating world of the Rolex Explorer II 1971, a rare and highly sought-after piece within the broader 16570 lineage, highlighting its unique characteristics and place within the Explorer II story.
The year 1971 doesn't mark the introduction of a new reference number for the Explorer II, as the 1655 was still in production. However, understanding the 1971 production run of the Explorer II requires looking at the subtle shifts in Rolex's manufacturing processes and material choices during this period, leading to a fascinating subset of watches within the later 16570 reference. These watches represent a transitional phase, bridging the gap between the original 1655 and the more widely known 16570 models that followed.
The Transition from 1655 to 16570: A Gradual Evolution
The Rolex Explorer II reference 1655, first introduced in 1971, featured a distinctive design with its orange 24-hour hand and fixed bezel. This model employed Tritium lume, a radioactive material used for its luminous properties. While effective, Tritium’s radioactive nature led Rolex to eventually phase it out in favor of the safer Luminova. This transition began in the late 1980s and was fully completed by 1998.
The 16570, which succeeded the 1655, inherited many of its key features but incorporated several refinements. These included changes to the movement, bracelet, and notably, the luminous material. The 1971 Explorer IIs, therefore, occupy a unique position: they represent watches produced during the overlap of these two references, sometimes exhibiting characteristics of both. These are the "middle siblings," as mentioned earlier, and are highly desirable due to their rarity and historical significance. They are not simply early examples of the 16570; they represent a period of subtle yet significant changes in Rolex's manufacturing.
Identifying a 1971 Explorer II: Key Characteristics
Pinpointing a 1971 Explorer II requires a careful examination of several features. While serial numbers offer the most definitive dating, other clues can help narrow down the time of manufacture:
* Lume: The crucial factor differentiating these transitional pieces is the lume. While the majority of 16570s utilized Luminova, the 1971 models might still feature Tritium lume, although less commonly than their 1655 predecessors. The presence of Tritium can be confirmed through testing, as the characteristic green glow differs from the more creamy off-white of Luminova. Furthermore, the aging of Tritium lume often results in a unique, creamy yellow or brown patina over time. This patina, while indicative of age, is not a definitive marker of a 1971 production.
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