Reference:sea-dweller: Difference between revisions

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{{#seo:

|title=Rolex Sea-Dweller Reference Guide — Rolexopedia

|description=Rolex Sea-Dweller history and selected reference guide, from early 1665 examples through the ~~2017 steel 126600~~, with documented dial groups, COMEX deliveries, and movement changes.

|description=Rolex Sea-Dweller history and selected reference guide, from early 1665 examples through the 2019 Yellow Rolesor 126603, with documented dial groups, COMEX deliveries, and movement changes.

|keywords=Rolex Sea-Dweller, 1665, 16660, 16600, 116600, 126600, Single Red Sea-Dweller, Double Red Sea-Dweller, Great White, Triple Six, Sea-Dweller 4000, COMEX, helium escape valve, Patent Pending, Pisani dial, Khanjar

|image=Sea-dweller vintage poster.webp

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</div>

The Sea-Dweller is Rolex's saturation-diving line, distinguished from the Submariner by its helium escape valve. Development examples appear in 1967, and civilian sales of the 1665 followed in the early 1970s. The references covered here are 1665, 16660, 16600, 116600, and ~~126600~~.

The Sea-Dweller is Rolex's saturation-diving line, distinguished from the Submariner by its helium escape valve. Development examples appear in 1967, and civilian sales of the 1665 followed in the early 1970s. The references covered here are 1665, 16660, 16600, 116600, 126600, and 126603.

The operational distinction sits at 9 o'clock on the case. A one-way helium release valve, Swiss patent CH492246 (filed November 1967, granted June 1970), lets helium dissolved in the watch during long mixed-gas chamber dives escape during decompression without popping the crystal off the case. The valve is the feature that separates the Sea-Dweller from the standard Submariner for saturation work.

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<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Cross-checking a long-run modern SD?</div><div class="rp-card-title">[[Reference:16600|16600]]</div><div class="rp-card-text">The long 3135 run, with tritium, Luminova, and Super-LumiNova dial eras, and the last Sea-Dweller with an aluminum bezel insert.</div></div></div>

<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Looking at the 43 mm steel Sea-Dweller?</div><div class="rp-card-title">[[Reference:126600|126600]]</div><div class="rp-card-text">Introduced in 2017 with calibre 3235, a Cyclops date and a single red dial line.</div></div></div>

<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Looking at the two-tone 43 mm Sea-Dweller?</div><div class="rp-card-title">[[Reference:126603|126603]]</div><div class="rp-card-text">Introduced in 2019 in Yellow Rolesor, with calibre 3235 and yellow-hued dial text.</div></div></div>

</div>

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== Modern 43 mm — 126600 (2017–present) ==

== Modern 43 mm — 126600 and 126603 (2017–present) ==

Rolex introduced the 126600 in 2017 for the Sea-Dweller’s 50th anniversary. The case grew to 43 mm, the movement changed to calibre 3235, and a Cyclops magnifies the date. Rolex retained the helium escape valve and 1,220 m rating. The red SEA-DWELLER line recalls the early red-dial 1665. [https://newsroom.rolex.com/watches/oyster-collection/sea-dweller Rolex Newsroom] [https://www.hodinkee.com/articles/the-rolex-sea-dweller-reference-126600 Hodinkee, 2017]

Rolex added the Yellow Rolesor 126603 in 2019 alongside the steel 126600. It keeps the 43 mm case, calibre 3235, helium escape valve and 1,220 m rating, with yellow gold on the bezel, crown and bracelet center links. The black dial uses yellow-hued SEA-DWELLER text. [https://content.rolex.com/dam/media/brochures/grand-public/2019_Oyster_New_Models_English.pdf Rolex, 2019 Oyster models brochure] [https://www.rolex.com/watches/sea-dweller/m126603-0001 Rolex, 126603 specifications]

Photographs show two dial executions at six o’clock: the 2017 Phillips example has SWISS MADE without a coronet; Rolex’s current product image shows the coronet between those words. Collectors call them Mk I and Mk II, but the name and transition date are not official Rolex specifications. See the [[Reference:126600|126600 reference page]] for the photographed differences and dated examples. [https://www.phillips.com/detail/rolex/197215 Phillips, lot 8117]

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|-

| [[Reference:126600|126600]] || 2017–present || 3235 || Sapphire with Cyclops || 1220m / 4000ft || 43 mm Oystersteel case; black Cerachrom insert; red SEA-DWELLER dial line.

|-

| [[Reference:126603|126603]] || 2019–present || 3235 || Sapphire with Cyclops || 1220m / 4000ft || 43 mm Yellow Rolesor case and bracelet; black Cerachrom insert; yellow-hued SEA-DWELLER dial line.

|}

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The valve sits at 9 o'clock on Sea-Dweller cases and is covered by Swiss patent CH492246, filed 6 November 1967 and granted in June 1970. During saturation work, helium can enter a watch case; during decompression, a one-way spring-loaded valve lets excess internal pressure escape without opening the case. The development history includes feedback from saturation divers, including Bob Barth.

The 1665 carries the valve in its first generation. The 16660 enlarges it for the 1220-metre depth rating, and the 16600, 116600, and ~~126600~~ retain the larger unit.

The 1665 carries the valve in its first generation. The 16660 enlarges it for the 1220-metre depth rating, and the 16600, 116600, 126600, and 126603 retain the larger unit.

== Historical anchors ==

@@ Line 2: / Line 2: @@
 {{#seo:
 |title=Rolex Sea-Dweller Reference Guide — Rolexopedia
-|description=Rolex Sea-Dweller history and selected reference guide, from early 1665 examples through the 2017 steel 126600, with documented dial groups, COMEX deliveries, and movement changes.
+|description=Rolex Sea-Dweller history and selected reference guide, from early 1665 examples through the 2019 Yellow Rolesor 126603, with documented dial groups, COMEX deliveries, and movement changes.
 |keywords=Rolex Sea-Dweller, 1665, 16660, 16600, 116600, 126600, Single Red Sea-Dweller, Double Red Sea-Dweller, Great White, Triple Six, Sea-Dweller 4000, COMEX, helium escape valve, Patent Pending, Pisani dial, Khanjar
 |image=Sea-dweller vintage poster.webp
@@ Line 18: / Line 18: @@
 </div>
-The Sea-Dweller is Rolex's saturation-diving line, distinguished from the Submariner by its helium escape valve. Development examples appear in 1967, and civilian sales of the 1665 followed in the early 1970s. The references covered here are 1665, 16660, 16600, 116600, and 126600.
+The Sea-Dweller is Rolex's saturation-diving line, distinguished from the Submariner by its helium escape valve. Development examples appear in 1967, and civilian sales of the 1665 followed in the early 1970s. The references covered here are 1665, 16660, 16600, 116600, 126600, and 126603.
 The operational distinction sits at 9 o'clock on the case. A one-way helium release valve, Swiss patent CH492246 (filed November 1967, granted June 1970), lets helium dissolved in the watch during long mixed-gas chamber dives escape during decompression without popping the crystal off the case. The valve is the feature that separates the Sea-Dweller from the standard Submariner for saturation work.
@@ Line 31: / Line 31: @@
 <div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Cross-checking a long-run modern SD?</div><div class="rp-card-title">[[Reference:16600|16600]]</div><div class="rp-card-text">The long 3135 run, with tritium, Luminova, and Super-LumiNova dial eras, and the last Sea-Dweller with an aluminum bezel insert.</div></div></div>
 <div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Looking at the 43 mm steel Sea-Dweller?</div><div class="rp-card-title">[[Reference:126600|126600]]</div><div class="rp-card-text">Introduced in 2017 with calibre 3235, a Cyclops date and a single red dial line.</div></div></div>
+<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Looking at the two-tone 43 mm Sea-Dweller?</div><div class="rp-card-title">[[Reference:126603|126603]]</div><div class="rp-card-text">Introduced in 2019 in Yellow Rolesor, with calibre 3235 and yellow-hued dial text.</div></div></div>
 </div>
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 |}
-== Modern 43 mm — 126600 (2017–present) ==
+== Modern 43 mm — 126600 and 126603 (2017–present) ==
 Rolex introduced the 126600 in 2017 for the Sea-Dweller’s 50th anniversary. The case grew to 43 mm, the movement changed to calibre 3235, and a Cyclops magnifies the date. Rolex retained the helium escape valve and 1,220 m rating. The red SEA-DWELLER line recalls the early red-dial 1665. [https://newsroom.rolex.com/watches/oyster-collection/sea-dweller Rolex Newsroom] [https://www.hodinkee.com/articles/the-rolex-sea-dweller-reference-126600 Hodinkee, 2017]
+Rolex added the Yellow Rolesor 126603 in 2019 alongside the steel 126600. It keeps the 43 mm case, calibre 3235, helium escape valve and 1,220 m rating, with yellow gold on the bezel, crown and bracelet center links. The black dial uses yellow-hued SEA-DWELLER text. [https://content.rolex.com/dam/media/brochures/grand-public/2019_Oyster_New_Models_English.pdf Rolex, 2019 Oyster models brochure] [https://www.rolex.com/watches/sea-dweller/m126603-0001 Rolex, 126603 specifications]
 Photographs show two dial executions at six o’clock: the 2017 Phillips example has SWISS MADE without a coronet; Rolex’s current product image shows the coronet between those words. Collectors call them Mk I and Mk II, but the name and transition date are not official Rolex specifications. See the [[Reference:126600|126600 reference page]] for the photographed differences and dated examples. [https://www.phillips.com/detail/rolex/197215 Phillips, lot 8117]
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 |-
 | [[Reference:126600|126600]] || 2017–present || 3235 || Sapphire with Cyclops || 1220m / 4000ft || 43 mm Oystersteel case; black Cerachrom insert; red SEA-DWELLER dial line.
+|-
+| [[Reference:126603|126603]] || 2019–present || 3235 || Sapphire with Cyclops || 1220m / 4000ft || 43 mm Yellow Rolesor case and bracelet; black Cerachrom insert; yellow-hued SEA-DWELLER dial line.
 |}
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 The valve sits at 9 o'clock on Sea-Dweller cases and is covered by Swiss patent CH492246, filed 6 November 1967 and granted in June 1970. During saturation work, helium can enter a watch case; during decompression, a one-way spring-loaded valve lets excess internal pressure escape without opening the case. The development history includes feedback from saturation divers, including Bob Barth.
-The 1665 carries the valve in its first generation. The 16660 enlarges it for the 1220-metre depth rating, and the 16600, 116600, and 126600 retain the larger unit.
+The 1665 carries the valve in its first generation. The 16660 enlarges it for the 1220-metre depth rating, and the 16600, 116600, 126600, and 126603 retain the larger unit.
 == Historical anchors ==