The Rolex Explorer II, reference 16570, holds a unique position in the lineage of this iconic tool watch. Produced between 1989 and 2011, it represents a fascinating transitional period for the model, bridging the gap between the earlier, more utilitarian designs and the modern iterations. While not as widely discussed as its predecessors or successors, the 16570 boasts a compelling history, marked by subtle yet significant changes in its design and materials, making it a highly sought-after piece for collectors today. This article will delve into the intricacies of the 16570's history, exploring its design evolution, the crucial shift away from Tritium lume, its market value, and comparisons with other Explorer II models.
The Genesis of a Transition: From 16550 to 16570
The 16570 didn't appear in a vacuum. It built upon the foundation laid by its predecessor, the reference 16550. The 16550, introduced in 1984, featured a larger case size (40mm) compared to its earlier counterparts, a more robust design, and a sapphire crystal for improved scratch resistance. However, it still retained the classic, utilitarian aesthetic that defined the Explorer II line.
The 16570, arriving in 1989, inherited these improvements but incorporated several key changes. While maintaining the 40mm case size, the 16570 subtly refined the design, resulting in a slightly more streamlined profile. These alterations, though subtle to the untrained eye, contributed to its overall refined look and feel. One significant feature carried over from the 16550 was the fixed bezel with a 24-hour graduated scale, a crucial element for the Explorer II's intended purpose as a tool watch for spelunking and other activities requiring timekeeping in low-light conditions.
The Luminova Transition: A Defining Characteristic
The year 1998 marks a pivotal point in the 16570's production history. This was the year Rolex transitioned from using Tritium lume to Luminova. Tritium, a radioactive isotope, provided a long-lasting, self-powered glow. However, concerns regarding its radioactivity led Rolex, along with many other watchmakers, to switch to Luminova, a non-radioactive, phosphorescent material.
This change in lume significantly impacts the value and desirability of the 16570. Watches produced before 1998 feature Tritium lume, resulting in a distinct creamy, aged patina over time. This patina is highly sought after by collectors, giving these early 16570s a unique vintage appeal. Watches produced after 1998 showcase Luminova, exhibiting a brighter, more modern glow. This distinction creates a clear division within the 16570 reference, making the Tritium-lumed examples particularly rare and collectible. The transition to Luminova serves as a defining characteristic that separates the earlier and later production runs of the 16570, making it a fascinating study in horological evolution.
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