The Rolex Sea-Dweller 16600 is the smaller, discontinued choice: a 40 mm watch with a historical published depth rating of 1,220 m / 4,000 ft and calibre 3135. The Deepsea 136660 is a current 44 mm model rated to 3,900 m / 12,800 ft, with Rolex’s Ringlock System case and calibre 3235. The practical decision is less about which rating is larger than whether you want the 16600’s more compact proportions or the Deepsea’s much larger, pressure-focused design.
How do the Sea-Dweller 16600 and Deepsea 136660 compare?
| Specification | Sea-Dweller 16600 | Deepsea 136660 |
|---|---|---|
| Case diameter | 40 mm, according to specialist historical references. | 44 mm, according to Rolex’s technical brochure. |
| Published water-resistance rating | 1,220 m / 4,000 ft, according to specialist historical references. | 3,900 m / 12,800 ft, according to Rolex’s technical brochure. |
| Movement | Calibre 3135, according to specialist historical references. | Calibre 3235, according to Rolex’s technical brochure. |
| Case design | Traditional Sea-Dweller format; construction details for this reference are not specified in the cited historical material. | Ringlock System case architecture and helium escape valve, described by Rolex. |
| Product status | Discontinued historical reference; production history is covered by specialist references. | Current product reference in Rolex technical materials; check availability with an official retailer. |
The figures are specifications, not a direct measure of daily comfort or a guarantee of present-day performance. The Deepsea’s published rating is substantially higher, while the 16600 is 4 mm smaller in diameter. Fit and visual preference matter alongside the movement generation and intended use.
What the depth ratings mean—and what they do not
On published specifications, the Deepsea 136660 is rated to more than three times the 16600’s depth: 3,900 m / 12,800 ft versus 1,220 m / 4,000 ft. Rolex describes the Deepsea’s Ringlock System as a patented case architecture developed to resist pressure at 3,900 metres. Its technical brochure also lists an approximate 70-hour power reserve.
Both are professional dive watches on paper, but a depth rating should not be treated as a promise that a decades-old pre-owned watch remains water-resistant. Seals age, watches can be repaired or damaged, and condition varies by individual example. Have a qualified watchmaker assess and pressure-test a 16600 before exposing it to water; its original published rating is not evidence of its current condition.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#1 Best Overall
- Mens Wrist Watch: Features a classic big dial and quartz movement with stable quality. High hardness coated glass mirror is wear-resistant, scratch-proof, Butterfly double buckle ensures comfortable wear
- OLEVS Mens Watches: Unique Classic Design Analog Date Calendar Display Watch Window. Easy to Read, Classic Business Style, Stylish Casual Dress Watch, Stylish Gold Indexes and Round Case, finely designed, stand the test of time, handsome and outstanding
- Business Pointer Quartz Watch: Dial diameter is 1.6 inches (41 mm). Case thickness is 0.43 inches (11 mm), steel band width is 0.79 inches (20 mm), length is 8.66 inches (22 cm). The weight of the men's watch is 4.16 ounces (118 g)
- Fashion Gold Green Man Watch: Luminous Hands/Markers and Enlarged Date Window at Three o'clock, Stylish Watch with Roman Scale Bezel, Water Resistance Up to 30M. Usually, Suitable for Swimming, But not Suitable for Deep Diving
- Night-light Function：When Using the Luminous Pointer Function for the First Time, Please illuminate The Watch Under The Light for 30 Seconds to Activate the Luminous Function. Watch Chain Can Be Adjusted in Size
Is the Deepsea too big for everyday wear?
At 44 mm, the Deepsea has a larger wrist presence than the 40 mm 16600. That difference makes size a central part of the choice, but the available specifications do not establish how either watch will feel on a particular wrist. Wrist shape, fit, and personal taste decide whether the Deepsea’s scale works for everyday wear; trying it on is more useful than treating diameter alone as a comfort verdict.
Choose the 16600 if you prefer the smaller case format and are comfortable buying a discontinued watch whose condition needs individual scrutiny. Choose the 136660 if you want Rolex’s current Deepsea design, its substantially greater published depth rating, and its modern case architecture—and you want a 44 mm watch.
Rank #2
- Fit：fit a Newer model Rolex Datejust Submariner Gmt, I, II, Explorer, Daytona, Yachtmaster, Deepsea Sea Dweller 116660 126610 126619 watch with 21mm lugs. It will not fit model 126300.
- Material：It is a Superior high quality watch band made of Quality 316L stainless steel. It is made particular for the above watches High standards which factory suggested.
- Size: 7.5 Inches (Clasp Closed), Links are removable by screw. Adjustable Glide Lock Clasp, Solid End Pieces For Secure Connection
- This Watch Band is strong and is durable and long lasting made particular to the above watches standards.
- Package Include:1 Oyster Adjustable Bracelet Watch Band (No logo or markings on the Watch Band)
How do their movements differ?
The 16600 is associated with calibre 3135 in specialist historical references. The Deepsea 136660 uses Rolex calibre 3235; Rolex’s brochure gives it an approximate 70-hour power reserve. These are different movement generations, but the cited specifications do not support a claim that one is more reliable or accurate than the other.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Do not confuse the 16600 with the current Sea-Dweller
The current Sea-Dweller reference 126600 is a separate model from both watches in this comparison. Rolex lists it at 43 mm, with 1,220 m / 4,000 ft water resistance and calibre 3235. It is not the 44 mm Deepsea 136660, whose rating is 3,900 m / 12,800 ft. Comparing model names without checking the reference number can therefore lead to a mistaken size or specification.
Recommended Free Tools
Rank #3
- Rubber watch strap soft and dust-resistant , comes with a quality stainless steel buckle, which is made of stainless steel.
- Please measure the width of your watch lug before ordering. It is important that your watch's lug width is the exact width of the band you select.
- Softness is moderate, wear very comfortable,Compression molding, sturdy and ,Wearable strap/wrist strap,suitable for original watch.
- Comfortable Fit: Soft, skin - friendly rubber conforms to wrist curves. Multiple adjustment holes ensure a perfect fit for all wrist sizes, offering stable, non - tight wear.
- Easy to insert and remove,very suitable for your watch.
What to check before buying a Sea-Dweller 16600
Because the 16600 is a discontinued reference, the condition of the individual watch is essential to the buying decision. Review its originality and service history, and inspect the bracelet for wear along with the dial and hands. Ask what documentation accompanies the watch, but do not treat paperwork as a substitute for an authenticity and condition assessment.
- Have a qualified watchmaker assess the watch and pressure-test it before any water use.
- Use an independent specialist to check authenticity and condition when buying through the secondary market.
- Rolex says only official Rolex retailers may sell and maintain Rolex watches. For an official retailer, use Rolex’s own guidance rather than assuming a secondary-market seller is authorized.
No current price comparison is established here, and the 16600’s value or availability should not be inferred from its historical specifications. The Deepsea’s current product status likewise does not guarantee local stock; check with an official retailer.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
