Reference:16550: Difference between revisions
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[[File:Ref 16550 hero.webp|thumb|right|340px|alt=Explorer II 16550 Polar|16550 Polar white dial]] | [[File:Ref 16550 hero.webp|thumb|right|340px|alt=Explorer II 16550 Polar|16550 Polar white dial]] | ||
The | The 16550 is the short-run transitional Explorer II. It replaces the 1655, introduces sapphire crystal and caliber 3085 with true independent-hour GMT function, and sets the basic black/white dial split that defines later Explorer II collecting. The cream-dial paint-defect watches are the branch most collectors mean when they talk about the reference. | ||
Four years is short by Rolex standards. The short run is one reason the 16550 has its own market; the cream-dial branch is what fixes the reference in collector memory. | Four years is short by Rolex standards. The short run is one reason the 16550 has its own market; the cream-dial branch is what fixes the reference in collector memory. | ||
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|- | |- | ||
| reference | | reference | ||
| | | 16550 | ||
|- | |- | ||
| family | | family | ||
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|- | |- | ||
| predecessor | | predecessor | ||
| | | 1655 | ||
|- | |- | ||
| successor | | successor | ||
| | | 16570 | ||
|} | |} | ||
==Where it sits in the line== | ==Where it sits in the line== | ||
The 16550 takes the Explorer II out of its first era and sets the template the line carried for the next thirty years. The | The 16550 takes the Explorer II out of its first era and sets the template the line carried for the next thirty years. The 1655 that came before used an acrylic crystal, caliber 1575 with a linked 24-hour hand that advanced together with the hour hand, and a case and bezel design that belonged to the early 1970s. The 16550 replaces all of that: sapphire crystal, caliber 3085 with a truly independent local-hour hand for second-time-zone use, and a redesigned 40mm case that sheds the thicker mid-1970s proportions. | ||
The caliber 3085 is the single biggest change. On the 1655, setting the watch advanced both the hour hand and the 24-hour hand together; the 24-hour function was a day-night indicator and nothing more. On the 16550 the local hour hand moves independently of the 24-hour hand. Arrive in a new time zone, jump the hour hand forward or back in one-hour steps, and the 24-hour hand stays on home time. That makes the 16550 the first Explorer II that works as a GMT in the conventional sense, sharing caliber 3085 with the contemporary GMT-Master II 16760. | The caliber 3085 is the single biggest change. On the 1655, setting the watch advanced both the hour hand and the 24-hour hand together; the 24-hour function was a day-night indicator and nothing more. On the 16550 the local hour hand moves independently of the 24-hour hand. Arrive in a new time zone, jump the hour hand forward or back in one-hour steps, and the 24-hour hand stays on home time. That makes the 16550 the first Explorer II that works as a GMT in the conventional sense, sharing caliber 3085 with the contemporary GMT-Master II 16760. | ||
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Surviving 16550 examples typically fall in the R, L, E, X, and 8.4M–9.7M serial ranges, with dealer-catalogue consensus placing the cream-dial peak in the 8.4M–8.5M band and continuing examples documented into 9.6M. The earliest cream-dial examples show up on B-series serials from 1985; later examples into 1987 and 1988 show the same issue. That four-year window for the paint defect covers most of the reference's production rather than a narrow early band. | Surviving 16550 examples typically fall in the R, L, E, X, and 8.4M–9.7M serial ranges, with dealer-catalogue consensus placing the cream-dial peak in the 8.4M–8.5M band and continuing examples documented into 9.6M. The earliest cream-dial examples show up on B-series serials from 1985; later examples into 1987 and 1988 show the same issue. That four-year window for the paint defect covers most of the reference's production rather than a narrow early band. | ||
No formal Mark dial taxonomy has converged across editorial sources for the 16550 the way it did for the | No formal Mark dial taxonomy has converged across editorial sources for the 16550 the way it did for the 1016 or the 1655. Late-production examples received the dial and hand design Rolex would carry forward to the 16570, which creates the central authenticity trap on the reference. A cream dial with black hour-marker surrounds is a late-transitional configuration on the 16550 and is also exactly what a later service-replaced dial looks like. The combination is not wrong on its own; it has to be read against the watch's paperwork and serial range. | ||
==Movement notes== | ==Movement notes== | ||
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The black dial 16550 is the base configuration. Matte black, applied white-gold indices with tritium lume plots, white-gold baton hands, a red 24-hour hand, quickset date at three. The dial printing carries the standard Explorer II layout: | The black dial 16550 is the base configuration. Matte black, applied white-gold indices with tritium lume plots, white-gold baton hands, a red 24-hour hand, quickset date at three. The dial printing carries the standard Explorer II layout: EXPLORER II at 12, OFFICIALLY CERTIFIED / CHRONOMETER above six, depth and water-resistance text at the bottom, and T SWISS T tritium notation across most production. | ||
A small share of early-to-mid-production black dials show a spider-crack pattern in the lacquer: fine hairline fractures radiating across the dial surface, picked up most easily under raking light. The pattern is a manufacturing defect in the early dial lacquer that Rolex did not catch at production. Collectors accept spider-cracked black dials as period-correct, and an aggressively cracked example is sometimes called a "super spider" and read as patina rather than damage. | A small share of early-to-mid-production black dials show a spider-crack pattern in the lacquer: fine hairline fractures radiating across the dial surface, picked up most easily under raking light. The pattern is a manufacturing defect in the early dial lacquer that Rolex did not catch at production. Collectors accept spider-cracked black dials as period-correct, and an aggressively cracked example is sometimes called a "super spider" and read as patina rather than damage. | ||
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===Cream and rail dial=== | ===Cream and rail dial=== | ||
The most-discussed variant on the 16550. A subset of Polar white dials aged to a distinctive cream or ivory tone, called | The most-discussed variant on the 16550. A subset of Polar white dials aged to a distinctive cream or ivory tone, called panna in Italian collector usage and peach on the most orange-shifted examples. The cream colour is not a factory-specified finish. The collector consensus traces it to a defect in the early white dial paint composition: the affected batch was more photosensitive than the corrected formula and oxidised unevenly over time, producing the cream shift. Rolex revised the paint mid-run, though no precise cutover date is documented. | ||
The | The rail dial sub-category within the cream family refers to the vertical alignment of the C in CHRONOMETER with the C in CERTIFIED, the same typographic feature collectors track on the 1655 Mark 3 Rail Dial. On the 16550, rail and non-rail variants both exist, and the rail dial carries a premium at auction. A cream-toned rail dial is the top configuration on the reference and the example that anchors cream-dial pricing. | ||
Cream dials with black hour-marker surrounds are either late-transitional production or later service replacements; the configuration alone does not separate the two. The standard authentication checks are dial-surround colour, lume-plot consistency, printing alignment, and paperwork. A papered cream-dial 16550 with white-gold surrounds and consistent lume is the configuration most collectors point to as the benchmark. | Cream dials with black hour-marker surrounds are either late-transitional production or later service replacements; the configuration alone does not separate the two. The standard authentication checks are dial-surround colour, lume-plot consistency, printing alignment, and paperwork. A papered cream-dial 16550 with white-gold surrounds and consistent lume is the configuration most collectors point to as the benchmark. | ||
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* [https://www.watchprosite.com/rolex/a-curiosity-rolex-explorer-ii-16550-prototype-/732.1358126.11928856/ "A Curiosity: Rolex Explorer II 16550 Prototype", WatchProSite] | * [https://www.watchprosite.com/rolex/a-curiosity-rolex-explorer-ii-16550-prototype-/732.1358126.11928856/ "A Curiosity: Rolex Explorer II 16550 Prototype", WatchProSite] | ||
[[Category:Explorer | [[Category:Explorer II]] | ||
[[Category: | [[Category:Working Draft]] | ||
[[Category:References]] | [[Category:References]] | ||