Reference:116600: Difference between revisions

The 116600 is a three-year reissue. Rolex unveiled it at Baselworld 2014, sold it through 2017, and replaced it at Baselworld 2017 with the 126600, the 50th-anniversary Sea-Dweller with the red dial text and the larger case. Six years had elapsed since the 116660 Deepsea moved the Sea-Dweller line to 44mm in 2008, and the 116600 walked the reference back to 40mm — the same Oyster diameter the 16660 and 16600 established, the same 1220-metre depth rating, the same helium escape valve at 9 o'clock. The changes sat elsewhere. A Cerachrom ceramic bezel replaced aluminum, the Parachrom Blu hairspring replaced the standard 3135 spring, Chromalight replaced Super-LumiNova, and a Maxi dial brought enlarged applied indices. The "Sea-Dweller 4000" marketing name carried over from the 16660 and 16600 even though "4000" never appeared on the 116600's dial. Three years of production with no mark generations makes it one of the shortest runs of any modern Rolex sport reference, and the last 40mm Sea-Dweller before the 126600 took the line to 43mm.

Between the 16600 ending in 2008 and the 116600 launching in 2014, the Sea-Dweller as a 40mm reference did not exist. The 116660 Deepsea ran at 44mm in the saturation-diving slot, and the Submariner Date 116610LN sat at 40mm but without the helium valve and 1220-metre depth rating. The 116600 closed that gap.

Three years later the 126600 closed it out. The 50th anniversary of the Sea-Dweller line — the 1665's 1967 prototype delivery to SEALAB 3 — called for a tribute reference, and Rolex built it at 43mm with the red "SEA-DWELLER" callback to the 1665 Single Red. That left the 116600 as the last small-case Sea-Dweller, the only modern Sea-Dweller without a Cyclops or red text, and the only one carrying a Cerachrom bezel against the aluminum-insert generation that preceded it.

Inside that three-year window nothing moved. The 116600 ran one dial, one bracelet, and one movement specification, with no mark generations and no transitional dial anomalies or factory colourways to sort. It carries the cleanest variant set in the entire Sea-Dweller line.

Rolex unveiled the 116600 at Baselworld 2014 as the return-to-40mm Sea-Dweller, with retail availability beginning in 2015 through the Authorised Dealer network. Launch pricing ran about USD 7,100 in the US, CHF 9,900 in Switzerland, EUR 8,500 in Europe, and SGD 13,560 in Singapore, roughly 15 percent below the Deepsea 116660 and 20 percent above the Submariner Date 116610LN.

Production ran continuously across three calendar years. Authorised-dealer allocation stayed available until late 2016, then dried up as the discontinuation approached, and the final 2017 allocations went to long-waitlist customers — forum coverage cites nine-month waits. Grey-market 2017 purchases at major retailers settled around the mid-USD 8,000 range by the discontinuation window, while final-year retail at authorised dealers reached about USD 10,400.

The caliber 3135 is the same base movement the 16600 wore, but the 116600 generation gets the Parachrom Blu hairspring as standard — the Sea-Dweller line's first Parachrom outing. Earlier 16600 examples were split as the Parachrom Blu rolled into the 3135 family progressively through the mid-2000s; the 116600 carries it from launch.

The movement runs 31 jewels at 28,800 vph, or 4 Hz, with about 48 hours of power reserve, quickset date, and hacking seconds. Its free-sprung balance sits under a full balance bridge on KIF Elastor shock absorbers, with the Paraflex variant on later production, and the Parachrom Blu hairspring is both paramagnetic and shock-resistant. Chronometer certification is COSC to the pre-2015 standard of ±6 seconds per day, before the 2015 Superlative Chronometer re-certification at ±2 seconds per day that the 126600 receives.

The cal 3135 architecture is otherwise unchanged from the 16600 generation, a movement already refined across two decades by the time the 116600 inherited it.

A single dial ran across the whole production. The face is matte black with applied indices surrounded by 18-karat gold edges, the "Maxi dial" framing introduced on the Submariner 16610LV "Kermit" in 2003 and standardised across the Rolex sport line in the late 2000s. The 116600's plots are enlarged relative to the 16600's and the surrounds are wider. The Mercedes hour hand is broader to match.

There is no Cyclops over the date window, continuing a Sea-Dweller convention that dates back to the 1665, where the unmagnified flat acrylic crystal was an operational requirement for saturation-pressure resistance. Sapphire crystals long ago made the Cyclops mechanically trivial on a dive watch, but the tradition stayed until the 126600 broke it.

The bezel insert is the 116600's signature feature. It runs Cerachrom, Rolex's proprietary zirconium-oxide ceramic, scratch-resistant and colourfast under UV. The 60-minute scale is fully graduated, not just the first 15 minutes; the full scale is a return to the MilSub-style minute track that the 5517 wore. Numerals and graduations are coated in platinum via magnetron sputtering. The bezel is engraved first, then platinum vapour is deposited in a vacuum chamber, then the surplus platinum is polished off everywhere except inside the engravings, leaving bright platinum graphics against the polished black ceramic surround. The pearl at 12 o'clock is lumed and matches the dial Chromalight.

Every Sea-Dweller before the 116600 wore an aluminum insert, the 16600 included, so the ceramic marks the first visual break in the line. The 126600 successor continues with Cerachrom.

The crystal is flat sapphire with no Cyclops, sitting slightly proud of the bezel edge. The crown is the Triplock screw-down with triple-gasket sealing, Rolex's standard sport-line architecture for the period.

The caseback is solid screw-down stainless steel, engraved with "ROLEX OYSTER", twin coronets, and "ORIGINAL GAS ESCAPE VALVE" — the same convention the 16600 carried and a feature throughout the modern line. The 126600 successor keeps the engraving on a thicker case profile.

The 97200 Oyster bracelet runs in 904L Oystersteel with solid centre and end-links and brushed centres with polished bevels. Lug width 20mm matches the case. The clasp carries two extension systems. Glidelock provides 20mm of fine adjustment in 2mm increments across 5 positions and works without tools — lift the safety latch, slide the clasp leaf to the next notch, and it clicks into place as the notched teeth on the underside of the leaf index against a sprung lever. Fliplock is the fold-out diver's extension, adding 26mm of length for wear over a 7mm dive-suit cuff.

Together they give the 116600 the most adjustable Sea-Dweller bracelet of the modern line; the 16600's clasp had Fliplock alone. The 126600 keeps both on a 21mm-lug bracelet with a broader clasp.

The 126600 launched in 2017 as the 50th-anniversary Sea-Dweller. The differences against the 116600:

The 126600 itself has Mark 1 and Mark 2 dial variants, early-run examples carrying a stick "1" in "1200m" with no coronet at 6, later-run examples a coronet at 6 and a refined "1". That divides 126600 collecting along a "Mark 1 premium" line, and it matters here only because the 116600 has no comparable in-life dial variants.

The USD 7,100 retail at the 2014 launch had climbed to about USD 10,000 on the 2018 secondary market. UK retail reached about GBP 10,000 by the 2017 discontinuation, against launch pricing of CHF 9,900 in Switzerland and EUR 8,500 in Europe.

The 116600 is the last 40mm Sea-Dweller. Every reference from the 1665 through the 16600 wore a 40mm case, the 116600 returned the line to that diameter for three years, and the 126600 broke the lineage in 2017 at 43mm. That alone is a collecting argument.

The case-and-spec mix adds to it. The 40mm Oyster at 1220 metres reads more tool than the 43mm 126600, while the Cerachrom bezel, Maxi dial, and 97200 Glidelock bracelet keep the watch contemporary on the wrist. The Cerachrom-vs-aluminum break against the 16600 sets the visual identity; the Parachrom Blu hairspring and 904L Oystersteel under the surface mark the engineering generation.

Taken together it reads as a bridge reference. The Cerachrom bezel and Chromalight lume come from the modern Rolex sport line, the no-Cyclops crystal and engraved caseback from the vintage Sea-Dweller idiom, the Parachrom Blu hairspring from the late-3135 era, and the case dimensions from the 16660 and 16600. Nothing in the 116600's spec sheet is new to Rolex on its own; the combination is.