Why We Love the Rolex Explorer II 16570 'Panna' 40mm 2003, Box & Papers

A white dial that has quietly turned the colour of clotted cream is not something Rolex ever intended, and that happy accident is exactly why this 2003 Explorer II reference 16570 stops watch people in their tracks. Complete with its box and papers, this 40mm example wears its two decades openly, its dial having warmed from crisp polar white into the soft buttermilk tone that Italian collectors christened "panna."

A Tool Watch Born Underground

The Explorer II was created for a very specific kind of adventurer. When Rolex launched the first reference 1655 in 1971, it was aimed at cave explorers and speleologists, people who spent long stretches underground with no daylight to tell them whether it was morning or night. The fixed 24-hour hand, read against a marked bezel, let them keep track of day and night when the sun was nowhere to be found. That practical brief separated the Explorer II from the travel-focused GMT-Master and gave the line its own identity.

The reference 16570 arrived in 1989 and went on to become one of the longest-running references in Rolex history, staying in the catalogue until roughly 2010 and 2011. Over that span it modernised the Explorer II considerably, introducing sapphire crystal, a 40mm case, applied white gold hour markers and a choice of black or white dials. It is, in many ways, the reference that carried the model from its vintage roots into the modern era while keeping the essential 24-hour concept intact.

The 2003 Example and Its Movement

A 16570 from 2003 sits firmly in the latter half of the reference's life, and that timing matters. Every 16570 produced up to 2007 was fitted with the Rolex calibre 3185, an automatic movement running at 28,800 vibrations per hour with a roughly 50-hour power reserve. In 2007 Rolex switched to the calibre 3186 with its Parachrom hairspring, so a watch of this vintage carries the earlier engine.

The 3185 is regarded as a robust, dependable GMT movement, known affectionately for one small character trait, a slight wobble in the independent 24-hour hand when the time is set. Far from a flaw, that little quirk is part of the charm of owning an earlier 16570 and a quiet reminder of exactly where this watch belongs in the reference's timeline.

The Panna Dial

The heart of this particular watch is its dial. "Panna" is simply the Italian word for cream, and it describes the warm ivory tone that certain early white dial Explorer IIs develop over time. The colour is not a factory finish. Early production runs of the white dial carried a paint composition that, after a number of years, aged from bright polar white into a rich, even cream. What began as an unintended quirk of the paint has become one of the most charming things a 16570 can do.

The tritium luminous material adds to the effect. Rolex used tritium as the glow agent on dials of this generation, and as it ages it mellows into soft, warm tones of its own. Because that ageing depends on sunlight, climate and the slow decay of the tritium itself, no two panna dials look precisely alike. Each one is a genuine one-off, a record of where the watch has been and how it has lived.

Cream tones are more famously associated with the earlier 16550 reference, which makes a genuinely creamed 16570 the rarer sight of the two. On the 16570 the transformation tends to be gentler and lighter, a subtle shift rather than a dramatic one, and many find that restraint even more appealing. The result on this 2003 example is a dial that reads white at a glance yet reveals its warm panna character the moment it catches the light.

Wearing History on the Wrist

Part of the appeal here is honesty. A modern watch is designed to look identical to every other example that left the factory. A panna 16570 does the opposite. It tells you it has existed in the world, that time has passed and left its mark in the most flattering way possible. The 40mm Oyster case, the fixed 24-hour bezel and the familiar three-link Oyster bracelet all remain thoroughly wearable by today's standards, so this is not a fragile relic but a watch that still slips onto the wrist and gets used.

Add the original box and papers, and the picture is complete. The documentation ties the watch to its 2003 origins and confirms the story its dial has been telling all along.

Final Thoughts

We love this Explorer II because it is two things at once, a purposeful tool watch with a genuine exploration heritage, and a naturally aged individual that no factory could ever replicate. The panna dial turns a well-built, dependable reference into something quietly personal, and the box and papers let that story stand on solid ground.

• Case in very good condition, very light hairlines visible.
• Lugs very sharp with factory brushing still visible.
• Bracelet in great condition, very light hairline scratches visible.

• Dial has aged into a cream colour