Reference:explorer-ii: Difference between revisions

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[[File:Ref_1655_hero.webp|thumb|center|640px|alt=Rolex Explorer II 1655|Rolex Explorer II ref. 1655, the first Explorer II]]
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The Explorer II is the fixed-bezel 24-hour sibling to the Explorer I. Rolex launched it in 1971 for cave and polar use, and every Explorer II since has kept the 24-hour hand and bezel.
The Explorer II is the fixed-bezel 24-hour sibling to the Explorer I. Rolex introduced it in 1971 for low-light and remote-field use, and every Explorer II has kept the 24-hour hand and engraved bezel.


Five references make up the line: the 1655 with linked-hand day-night logic, the 16550 with the first true GMT function, the 16570 across the long middle run, the 42mm 216570 from 2011, and the 226570 in current production.
The line runs from the 1655, whose 24-hour hand is linked to local time, through the independently adjustable 16550, 16570, and 216570, to the current 226570.


== Common entry points ==
== Common entry points ==
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! Reference !! Production !! Movement !! Case !! Key distinction
! Reference !! Production !! Movement !! Case !! Key distinction
|-
|-
| [[Reference:1655|1655]] || 1971–1984 || Cal. 1575 GMT || 40mm SS, acrylic || Freccione orange straight/lollipop hand; 5 Mark dials + 2 service dials; linked-hand 24-hour; fixed engraved steel bezel
| [[Reference:1655|1655]] || 1971–1984 || Cal. 1575 GMT || 40mm SS, acrylic || Orange 24-hour hand; documented Mark and service-dial groups; linked-hand 24-hour display; fixed engraved steel bezel
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! Reference !! Production !! Movement !! Case !! Key distinction
! Reference !! Production !! Movement !! Case !! Key distinction
|-
|-
| [[Reference:16550|16550]] || 1985–1989 || Cal. 3085 || 40mm SS, sapphire || First sapphire; first independent-hour GMT; black or Polar white dial; cream/rail dial paint-defect variant
| [[Reference:16550|16550]] || 1985–1989 || Cal. 3085 || 40mm SS, sapphire || First sapphire and first independent-hour GMT; black or white dial; documented cream and rail-dial variants
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! Reference !! Production !! Movement !! Case !! Key distinction
! Reference !! Production !! Movement !! Case !! Key distinction
|-
|-
| [[Reference:16570|16570]] || 1989–2010 || Cal. 3185, then 3186 late || 40mm SS, sapphire || Four internal versions: V1 tritium, V2 Swiss-only, V3 Super-LumiNova, V4 no-holes case plus cal 3186; black or Polar white; SRR military limited edition 2007
| [[Reference:16570|16570]] || 1989–2010 || Cal. 3185, then 3186 late || 40mm SS, sapphire || Tritium, Luminova, and Super-LumiNova dial eras; late 3186 examples; black or white dial; documented military issue
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== Current-production successors ==
== Current-production successors ==


The 42mm successors continue the line beyond the vintage and neo-vintage generations. Both keep the engraved solid-steel 24-hour bezel the line has carried since 1971; no Explorer II has used a Cerachrom insert.
The 42 mm successors continue the line beyond the vintage and neo-vintage generations. Both keep the engraved solid-steel 24-hour bezel used since 1971; Explorer II references have not adopted a Cerachrom insert.


* [[Reference:216570|216570]] (2011–2021) — 42mm case, cal. 3187, reintroduced orange 24-hour hand
* [[Reference:216570|216570]] (2011–2021) — 42mm case, cal. 3187, reintroduced orange 24-hour hand
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| 1575 GMT || 19,800 vph || ~48 hr || linked to hour hand || 1655 || Shared with GMT-Master 1675; 24-hour hand advances with hour hand, works as day-night indicator
| 1575 GMT || 19,800 vph || ~48 hr || linked to hour hand || 1655 || Shared with GMT-Master 1675; 24-hour hand advances with hour hand, works as day-night indicator
|-
|-
| 3085 || 28,800 vph || 48 hr (disputed: some sources say 42 hr) || independent-hour || 16550 || First Explorer II with true GMT; shared with GMT-Master II 16760 "Fat Lady"; 6.3mm thick
| 3085 || 28,800 vph || catalogues vary, about 42–48 hr || independent-hour || 16550 || First Explorer II with independent-hour GMT; also used in GMT-Master II 16760
|-
|-
| 3185 || 28,800 vph || ~50 hr || independent-hour || 16570 || Successor to 3085 with minor revisions; ran through most of the 16570
| 3185 || 28,800 vph || ~50 hr || independent-hour || 16570 || Successor to 3085 with minor revisions; ran through most of the 16570
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|-
| 3186 || 28,800 vph || ~50 hr || independent-hour || 16570 (late 2006+) || Added blue Parachrom hairspring; fixed the 3185 GMT-hand wobble
| 3186 || 28,800 vph || ~50 hr || independent-hour || 16570 (late run) || Revised gear train and blue Parachrom hairspring
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Variant taxonomy across the line, in brief:
Variant taxonomy across the line, in brief:


* 1655 Mark dials — Mk1 (large crown), Mk2 (Frog Foot), Mk3 (Rail Dial), Mk4 (taller crown, T SWISS <25 T serif), Mk5 (sans-serif). Two Beyeler service dials also exist.
* 1655 Mark dials: collector groups commonly called Mk1 through Mk5, plus documented Beyeler service dials. Names and boundaries vary between sources.
* 16550 cream / rail dial — a subset of Polar white dials aged to cream through a factory paint defect Rolex later corrected. Rail-dial sub-variant has the C of CHRONOMETER aligned vertically over the C of CERTIFIED.
* 16550 cream / rail dial: some Polar dials aged to cream; the rail variant aligns the C of CHRONOMETER over the C of CERTIFIED.
* 16570 Swiss-only — about 5 percent of production, covering the 1998–1999 window when the dial carried Luminova lume but kept the older SWISS (not SWISS MADE) printing.
* 16570 Swiss-only: a short Luminova period around 1998–1999 retained SWISS rather than SWISS MADE printing. Its share of total production is not established.


== Cross-references ==
== Cross-references ==