Short answer: The Submariner is Rolex's everyday diver: 41 mm, waterproof to 300 m (1,000 ft), with no helium escape valve. The Sea-Dweller is built for saturation diving: 43 mm, 1,220 m (4,000 ft), a helium escape valve and red Sea-Dweller text. The Deepsea goes to 3,900 m (12,800 ft) in a 44 mm Ringlock case with no Cyclops lens. All the date models run on calibre 3235 with about 70 hours of power reserve. Rolex's 2026 US list prices start at $10,050, $14,550 and $15,550. On October 19, 2026 Bizak's asks for new watches started at $15,785 for a Submariner Date 126610LN, $14,914 for a Sea-Dweller 126600 and $15,132 for a Deepsea 136660.
Last reviewed on October 19, 2026 by Filip Biczak. Specifications and US list prices come from Rolex's 2026 catalog on rolex.com, read that day; Bizak prices are that day's asking prices, not quotes. Bizak & Co. is independent and not affiliated with Rolex. Sources: Rolex's Submariner, Sea-Dweller and Deepsea collection pages on rolex.com for depth ratings, case sizes and movements.
Shop by model: Submariner · Sea-Dweller · Deepsea
Submariner vs Sea-Dweller vs Deepsea at a glance
Rolex's 2026 US catalog lists seven Submariners, two Sea-Dwellers and three Deepseas (the 136660 with a black or D-blue dial and the yellow gold 136668LB), plus the 50 mm Deepsea Challenge.
| Submariner | Sea-Dweller | Deepsea | |
|---|---|---|---|
| Diameter | 41 mm | 43 mm | 44 mm |
| Thickness (dealer measurements) | about 12.5 mm | about 15 mm | about 18 mm |
| Waterproof to | 300 m (1,000 ft) | 1,220 m (4,000 ft) | 3,900 m (12,800 ft) |
| Helium escape valve | No | Yes | Yes |
| Crystal | Sapphire, Cyclops on Date models | Sapphire, Cyclops over the date | Domed sapphire, 5.5 mm thick, no Cyclops |
| Movement | 3235 (3230 in the no-date 124060) | 3235 | 3235 |
| Metals | Oystersteel, yellow Rolesor, yellow gold | Oystersteel, yellow Rolesor | Oystersteel, yellow gold |
| Rolex US list from | $10,050 | $14,550 | $15,550 |
| Bizak ask from, Oct 19 | $12,622 pre-owned | $13,580 pre-owned | $13,265 pre-owned |
Rolex publishes no thickness figures.
Depth ratings: who needs 1,220 m or 3,900 m?
Rolex tests the waterproofness of every finished watch for its Superlative Chronometer certification. The Submariner was rated to 100 m (330 ft) at its 1953 launch and to 300 m today. The Sea-Dweller arrived in 1967 for saturation diving at 610 m (2,000 ft) and has been rated to 1,220 m since 1978. Comex divers wore Sea-Dwellers on record dives to 534 m in open water (1988) and 701 m in a hyperbaric chamber (1992), records Rolex says still stand. The Deepsea's 3,900 m, about three tonnes on the crystal by Rolex's figure, is more than five times the deepest of those dives: a measure of the case, not of any dive you will make.
The helium escape valve
Saturation divers spend days in a pressurized chamber breathing a helium-rich gas. Helium molecules are small enough to get through a case's seals, and if the gas cannot escape fast enough during decompression it can push the crystal off. Rolex's valve, patented in 1967, is one-way and opens by itself when the pressure inside the case exceeds the pressure outside. The Sea-Dweller, Deepsea and Deepsea Challenge have one; the Submariner does not. If you never dive in saturation, the valve is something you carry rather than use.
Size, thickness and bracelet
On the wrist, thickness separates them more than diameter. All three come on an Oyster bracelet with an Oysterlock clasp and the Glidelock extension: ten notches of about 2 mm, adjusted without tools. Many comparisons say the Sea-Dweller also has a Fliplock link, but Rolex says the Deepsea Challenge is the only Rolex fitted with one (about 26 mm of extra length).
How to tell them apart
- Read the dial. The Submariner says SUBMARINER and 1000ft = 300m in white. The Sea-Dweller says SEA-DWELLER in red, a nod to the first model of 1967, over 4000ft = 1220m. The Deepsea shows DEEPSEA under the Rolex name and SEA-DWELLER in white over 12800ft = 3900m.
- Look for the Cyclops. The Submariner Date and the Sea-Dweller magnify the date (the Sea-Dweller only since 2017); the Deepsea does not.
- Check the inner ring. On the Deepsea it reads Ring Lock System and Original Gas Escape Valve.
Movements: calibre 3235 or 3230
The Submariner Date, Sea-Dweller and Deepsea use calibre 3235; the no-date Submariner 124060 and the Deepsea Challenge use the 3230. Both are Rolex-made automatics with about 70 hours of power reserve, a Chronergy escapement and a Parachrom hairspring, certified to -2/+2 seconds a day after casing, so none of the three is more accurate. The Sea-Dweller was the first Professional Rolex to get the 3235, in 2017.
Prices: Rolex list vs Bizak asks
| Reference | Model and metal | Rolex US list | Bizak ask from, Oct 19 |
|---|---|---|---|
| 124060 | Submariner (no date), steel | $10,050 | $12,622 pre-owned |
| 126610LN | Submariner Date, steel | $11,350 | $15,785 new |
| 126610LV | Submariner Date, steel, green bezel | $11,900 | $12,833 pre-owned |
| 126613LN | Submariner Date, two-tone, black | $19,450 | $16,368 pre-owned |
| 126613LB | Submariner Date, two-tone, blue | $19,450 | $18,150 pre-owned |
| 126618LN | Submariner Date, yellow gold, black | $50,900 | $42,460 pre-owned |
| 126618LB | Submariner Date, yellow gold, blue | $50,900 | $43,312 pre-owned |
| 126600 | Sea-Dweller, steel | $14,550 | $13,580 pre-owned |
| 126603 | Sea-Dweller, two-tone | $22,450 | $17,169 pre-owned |
| 136660 | Deepsea, steel, black | $15,550 | $13,265 pre-owned |
| 136660 | Deepsea, steel, D-blue | $15,880 | $15,054 pre-owned |
| 136668LB | Deepsea, yellow gold, blue | $68,100 | $60,089 pre-owned |
| 126067 | Deepsea Challenge, RLX titanium | $29,100 | $38,315 new |
For new watches the order flips. Rolex lists the Sea-Dweller $3,200 and the Deepsea $4,200 above the Submariner Date, yet Bizak's lowest new asks were $14,914 for a 126600 and $15,132 for a black 136660 against $15,785 for a 126610LN. Most two-tone and gold pieces sit below list, such as a new 126603 at $18,598 against $22,450. The white gold Submariner 126619LB has left Rolex's US catalog; Bizak asked from $39,673 pre-owned.
Earlier references for less
The 40 mm Sea-Dwellers 16600 and 116600 and the first Deepsea, the 116660, use the previous calibre 3135, and the two Sea-Dwellers have no Cyclops. On October 19, 2026 Bizak's pre-owned asks started at $10,040 for a Sea-Dweller 16600, $11,159 for a 116600, $10,043 for a Deepsea 116660 and $12,155 for a 40 mm Submariner 114060. See the 40 mm Sea-Dweller collection.
Which should you buy?
- Submariner for the slimmest case and the widest choice: steel, two-tone or gold, black, green or blue bezels, with or without a date.
- Sea-Dweller for a bigger 43 mm dial, the helium valve and the red text with a Cyclops date, at about what a Submariner Date costs on the secondary market.
- Deepsea for the toughest case and the D-blue dial, if a case about 18 mm thick with no Cyclops suits you.
- Deepsea Challenge only for the extreme: 50 mm of RLX titanium, waterproof to 11,000 m (36,090 ft).
Quick answers
What is the difference between the Rolex Submariner and the Sea-Dweller?
The Sea-Dweller is the deeper-rated diver: 43 mm against 41 mm, waterproof to 1,220 m (4,000 ft) against 300 m (1,000 ft), with a helium escape valve and red Sea-Dweller text. Both date models use calibre 3235. Rolex lists the Sea-Dweller 126600 at $14,550 and the Submariner Date 126610LN at $11,350.
Is the Sea-Dweller bigger than the Submariner?
Yes. It is 43 mm across against 41 mm, and dealer measurements put it at about 15 mm thick against about 12.5 mm, so it sits higher on the wrist.
Does the Rolex Sea-Dweller have a Cyclops lens?
Yes, since the 43 mm 126600 of 2017. Earlier 40 mm Sea-Dwellers such as the 16600 and 116600 have none, and neither does the Deepsea, whose domed sapphire crystal is 5.5 mm thick.
What is the difference between the Sea-Dweller and the Deepsea?
The Deepsea is bigger and deeper-rated: 44 mm and 3,900 m (12,800 ft) with Rolex's Ringlock case, against 43 mm and 1,220 m. Both have a helium escape valve and calibre 3235; only the Sea-Dweller has a Cyclops. Rolex lists the 136660 from $15,550 and the 126600 at $14,550.
Do I need a helium escape valve?
Only for saturation diving, where the valve lets helium out of the case during decompression. For recreational diving and daily wear it has no use, which is why the Submariner does without one.
Which is more expensive, the Submariner or the Sea-Dweller?
At Rolex's 2026 US list prices the Sea-Dweller 126600 ($14,550) costs $3,200 more than the Submariner Date 126610LN ($11,350). On October 19, 2026 Bizak's lowest new asks were $14,914 for a 126600 and $15,785 for a 126610LN.
Does the Sea-Dweller have a Fliplock extension?
No. Rolex lists the Submariner, Sea-Dweller and Deepsea with an Oysterlock clasp and the Glidelock extension. It says the Deepsea Challenge is the only Rolex fitted with the Fliplock link, which adds about 26 mm.
Request a sourcing quote
Looking for a particular dial, metal or earlier reference? Send the details through our sourcing enquiry form.
Related reading: Sea-Dweller 126600 guide · Deepsea 136660 guide · Rolex Submariner price guide · Rolex Submariner review
0 comments