Reference:explorer-ii: Difference between revisions

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Latest revision as of 21:35, 28 September 2026

Rolex Explorer II 1655 — Rolex Explorer II ref. 1655, the first Explorer II

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.

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

Identifying a vintage orange-hand Explorer II?

1655

The Freccione. Five Mark dials plus two service dials, caliber 1575 GMT shared with the GMT-Master 1675.

Working from a Polar or cream dial?

16550

First sapphire-crystal Explorer II, first true independent-hour GMT function, the cream / rail dial paint-defect sub-branch.

Cross-checking a long-run modern?

16570

Twenty-one-year production run across four internal versions (V1 tritium through V4 caliber 3186), plus the 2007 SRR military limited edition.

The first Explorer II (1971–1984)

Reference	Production	Movement	Case	Key distinction
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

The transitional reference (1985–1989)

Reference	Production	Movement	Case	Key distinction
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

The long-run modern reference (1989–2010)

Reference	Production	Movement	Case	Key distinction
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

Current-production successors

The 42 mm successors continue the line beyond the vintage and neo-vintage generations. They retain the engraved solid-steel 24-hour bezel used since 1971; the Explorer II line continues with a steel bezel rather than Cerachrom.

216570 (2011–2021) — 42mm case, cal. 3187, reintroduced orange 24-hour hand
226570 (2021–present) — cal. 3285, current production

Movement progression

Caliber	Frequency	Power reserve	24-hour function	Used in	Notes
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	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
3186	28,800 vph	~50 hr	independent-hour	16570 (late run)	Revised gear train and blue Parachrom hairspring

Dial variant highlights

The main documented variants are:

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: some Polar dials aged to cream; the rail variant aligns the C of CHRONOMETER over the C of CERTIFIED.
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

The Explorer II is the sibling of the Explorer I line and shares calibers and case architecture with the GMT-Master line. Caliber 1575 in the 1655 is the same movement fitted to the GMT-Master 1675, configured differently: linked-hand on the Explorer II, independent-hour on the GMT-Master. The 16550's caliber 3085 is the movement that also powered the GMT-Master II 16760.

Related families

Explorer — the original line, with related case design and Mercedes hands but no 24-hour function.
GMT-Master — the shared-movement sibling; the 1655 uses a linked-hand 1575 GMT and the 16550 uses caliber 3085.
Submariner — a parallel tool line whose references moved through successive movement generations.

Shared references

Serial numbers by year — date any Explorer II from its serial
Movement reference — the calibers used across the Explorer II line
Bracelet & clasp guide — bracelet types, end-links, and clasp date codes

Sources

The Rolex Explorer II Models — Rolex Newsroom
In-Depth: The History of the Rolex Explorer II, The Ultimate Adventure Watch — Monochrome
Tooled Up: The Rolex Explorer II Reference 1655 — Ross Povey, Revolution
Mr Rolex Orange Hand, Reinhold Messner and Sir Edmund Hillary's Original Vintage Explorer II ref 1655 — Philipp Stahl, Rolex Passion Report
Spelunking Into the Details: The Rolex Explorer II Reference 16550 — Tony Traina, European Watch Co.
Buyer's Guide: Explorer II Ref. 16570, All Variations — Jorg Weppelink, Fratello
The Rolex Explorer II Ref. 1655: A Complete Guide — Andrea David, Italian Watch Spotter
Rolex Explorer II 16550 vs 16570 — Alessandro Metelli, Italian Watch Spotter
Exceptional Movements In History: Rolex Caliber 1575 — Quill & Pad
Rolex Caliber 3085 Complete Guide — Millenary Watches
Collector Guide: The Rolex Explorer II — All References in Detail — Beyond The Dial
The Vintage Rolex Field Manual — Colin A. White, Morning Tundra

@@ Line 1: / Line 1: @@
 {{DISPLAYTITLE:Rolex Explorer II}}
 {{#seo:
-|title=Rolex Explorer II — Complete Reference Guide — BezelBase
+|title=Rolex Explorer II — Complete Reference Guide — Rolexopedia
 |description=Every Rolex Explorer II reference from the 1971 Freccione 1655 through the 16550, 16570, 216570, and current 226570. Production histories, dial variants, Mark taxonomies, movement specs, and collector context.
 |keywords=Rolex Explorer II, 1655, Freccione, 16550, cream dial, 16570, Polar, 216570, 226570, vintage Rolex, 24-hour GMT
+|image=Ref_1655_hero.webp
+|image_alt=Rolex Explorer II reference 1655
 |type=Article
 }}
-== Rolex Explorer II ==
+<div class="rp-lead">
+[[File:Ref_1655_hero.webp|thumb|center|640px|alt=Rolex Explorer II 1655|Rolex Explorer II ref. 1655, the first Explorer II]]
+</div>
-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 ==
-{| style="width:100%; border-collapse:separate; border-spacing:8px 0; margin:1em 0 1.5em 0;"
+<div class="rp-grid">
-|-
+<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Identifying a vintage orange-hand Explorer II?</div><div class="rp-card-title">[[Reference:1655|1655]]</div><div class="rp-card-text">The Freccione. Five Mark dials plus two service dials, caliber 1575 GMT shared with the GMT-Master 1675.</div></div></div>
-| style="width:33%; padding:14px; background:#f8f8f6; border-left:3px solid #555; vertical-align:top;" | ''Identifying a vintage orange-hand Explorer II?''<br/>'''[[Reference:1655|1655]]''' — the Freccione. Five Mark dials plus two service dials, caliber 1575 GMT shared with the GMT-Master 1675.
+<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Working from a Polar or cream dial?</div><div class="rp-card-title">[[Reference:16550|16550]]</div><div class="rp-card-text">First sapphire-crystal Explorer II, first true independent-hour GMT function, the cream / rail dial paint-defect sub-branch.</div></div></div>
-| style="width:33%; padding:14px; background:#f8f8f6; border-left:3px solid #555; vertical-align:top;" | ''Working from a Polar or cream dial?''<br/>'''[[Reference:16550|16550]]''' — first sapphire-crystal Explorer II, first true independent-hour GMT function, the cream / rail dial paint-defect sub-branch.
+<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Cross-checking a long-run modern?</div><div class="rp-card-title">[[Reference:16570|16570]]</div><div class="rp-card-text">Twenty-one-year production run across four internal versions (V1 tritium through V4 caliber 3186), plus the 2007 SRR military limited edition.</div></div></div>
-| style="width:33%; padding:14px; background:#f8f8f6; border-left:3px solid #555; vertical-align:top;" | ''Cross-checking a long-run modern?''<br/>'''[[Reference:16570|16570]]''' — twenty-one-year production run across four internal versions (V1 tritium through V4 caliber 3186), plus the 2007 SRR military limited edition.
+</div>
-|}
 == The first Explorer II (1971–1984) ==
@@ Line 28: / Line 31: @@
 ! 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
 |}
@@ Line 37: / Line 40: @@
 ! 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
 |}
@@ Line 46: / Line 49: @@
 ! 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
 |}
 == 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. They retain the engraved solid-steel 24-hour bezel used since 1971; the Explorer II line continues with a steel bezel rather than Cerachrom.
 * [[Reference:216570|216570]] (2011–2021) — 42mm case, cal. 3187, reintroduced orange 24-hour hand
@@ Line 64: / Line 67: @@
 | 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
 |-
-| 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
 |}
 == Dial variant highlights ==
-Variant taxonomy across the line, in brief:
+The main documented variants are:
-* 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 ==
@@ Line 85: / Line 88: @@
 == Related families ==
-* [[Reference:explorer|Explorer]] — the original line. Same case lineage, same Mercedes hands, no 24-hour function.
+* [[Reference:explorer|Explorer]] — the original line, with related case design and Mercedes hands but no 24-hour function.
-* [[Reference:gmt-master|GMT-Master]] — the shared-movement sibling. Caliber 1575 GMT in the 1655 and caliber 3085 in the 16550 carry over from the GMT-Master family.
+* [[Reference:gmt-master|GMT-Master]] — the shared-movement sibling; the 1655 uses a linked-hand 1575 GMT and the 16550 uses caliber 3085.
-* [[Reference:submariner|Submariner]] — the parallel tool line. Same case-era cadence, same generation-by-generation movement progression.
+* [[Reference:submariner|Submariner]] — a parallel tool line whose references moved through successive movement generations.
 == Shared references ==
@@ Line 97: / Line 100: @@
 == Sources ==
+* [https://newsroom.rolex.com/watches/oyster-collection/explorer-ii The Rolex Explorer II Models] — Rolex Newsroom
 * [https://monochrome-watches.com/history-rolex-explorer-ii-adventure-watch-gmt-1655-16550-16570-216570-226570-in-depth/ In-Depth: The History of the Rolex Explorer II, The Ultimate Adventure Watch] — Monochrome
 * [https://revolutionwatch.com/tooled-rolex-explorer-ii-reference-1655/ Tooled Up: The Rolex Explorer II Reference 1655] — Ross Povey, Revolution