Rolex · Land-Dweller 40 and 1908
Rolex 127334 vs Rolex 52508
12 published specifications differ between these two, and 3 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | ||
|---|---|---|
| Case | Oyster, 40 mm, Oystersteel and white gold. Monobloc middle case, screw-down case back and winding crown. White Rolesor — combination of Oystersteel and white gold | 39 mm, 18 ct yellow gold, polished finish |
| Diameter | 40 mm | 39 mm |
| Water resistance | Waterproof to 100 metres / 330 feet | Waterproof to 50 metres / 165 feet |
| Crystal | Scratch-resistant sapphire, Cyclops lens over the date | Scratch-resistant sapphire |
| Bezel | Fluted | Domed and fluted |
| Dial | Intense white, honeycomb motif, with highly legible Chromalight display with long-lasting blue luminescence | Intense white |
| Case back | Transparent case back with anti-reflective coating; screw-down | Domed transparent case back with anti-reflective coating |
| Crown | Screw-down, Twinlock double waterproofness system | Domed |
| Bracelet | Flat Jubilee, five-piece solid links, Oystersteel | Leather strap, matt brown alligator leather |
| Clasp | Concealed folding Crownclasp | Double folding Dualclasp |
| Calibre | Calibre 7135, Manufacture Rolex | Calibre 7140, manufacture Rolex |
| Movement notes | Precision −2/+2 sec/day after casing. Instantaneous date with rapid setting and stop-seconds. Syloxi hairspring in silicon with patented geometry, with Paraflex shock absorbers. | Precision −2/+2 sec/day after casing. Centre hour and minute hands with small seconds at 6 o'clock. Syloxi hairspring in silicon with patented geometry, and Paraflex shock absorbers. |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Movement
- Perpetual, mechanical, self-winding; bidirectional self-winding via Perpetual rotor
- Power reserve
- Approximately 66 hours
- Certification
- Superlative Chronometer (official chronometer certification + Rolex certification after casing)
What the differences cost you
Each note below follows from the published figures in the tables above — what they mean for intake, for a listing, and for the handover. Nothing here estimates a price or a margin.
Do not describe these the same way
The 52508 is rated to 50 metres and the 127334 to 100. A rating is a factory figure for a new watch with fresh gaskets, not a promise about a used one — but the gap still matters in writing. Describe the 52508 in words a buyer can act on, and do not let a template carry the 127334's language onto it.
One needs sizing, the other needs stock
The 127334 comes on a bracelet and the 52508 on a strap. They are different jobs at resale: a bracelet has to be sized and its removed links kept with the watch, because a buyer who receives it short of links has received an incomplete watch. A strap is a consumable — check whether the one on the wrist is the one that should be in the photographs.
Different movements to verify and to service
The 127334 runs the Calibre 7135, Manufacture Rolex and the 52508 the Calibre 7140, manufacture Rolex. Two consequences at intake: the service history that is normal for one calibre is not evidence about the other, and the calibre is the check that catches a movement swapped into the wrong case. Confirm the movement matches the reference rather than assuming it from the dial.
What to check on each
127334
- Inspect the transparent case back closely, including its anti-reflective coating. It is unusual on an Oyster case, it faces the wrist, and marks on it are both visible and awkward to remedy.
- Check the honeycomb dial texture is even across the whole surface and under the markers. A textured dial shows handling damage and moisture marking far more readily than a flat one.
- Confirm the movement is the 7135 with a Syloxi hairspring rather than one of the Parachrom calibres. The 66-hour reserve belongs to this movement family, not the 70-hour ones.
52508
- Inspect the transparent case back for scratches and for the condition of its anti-reflective coating. It is a display window on the wrist side, it is the first Rolex case back here you can actually see through, and a marked one is immediately noticeable.
- Check the crown is the domed, non-screw-down type this reference specifies. Trying to screw down a crown that was never designed to screw down is a way to damage the stem and the case tube.
- Treat the 50 metre rating as the real constraint it is. This is the least water-resistant watch in this corpus by some margin and should be kept away from water entirely.
Sources
- Rolex official product page for reference 127334 (Land-Dweller 40; Oyster 40 mm; Oystersteel and white gold) - Model case: Oyster; 40 mm; Oystersteel and white gold; Oyster architecture: monobloc middle case; screw-down case back and winding crown; Diameter: 40 mm; Material: White Rolesor - combination of Oystersteel and white gold; Bezel: fluted; Winding crown: screw-down with Twinlock double waterproofness system; Crystal: scratch-resistant sapphire with Cyclops lens over the date; Case back: transparent case back with anti-reflective coating; Water resistance: waterproof to 100 metres / 330 feet; Movement: perpetual; mechanical; self-winding; Calibre: 7135; Manufacture Rolex; Precision: -2/+2 sec/day after casing; Functions: centre hour; minute and seconds hands; instantaneous date with rapid setting; stop-seconds for precise time setting; Oscillator: Syloxi hairspring in silicon with patented geometry and high-performance Paraflex shock absorbers; Winding: bidirectional self-winding via Perpetual rotor; Power reserve: approximately 66 hours; Bracelet: flat Jubilee; five-piece solid links; Oystersteel; Clasp: concealed folding Crownclasp; Dial: intense white with honeycomb motif and highly legible Chromalight display; Certification: Superlative Chronometer — retrieved 2026-09-22
- Rolex official product page for reference 52508 (1908; 39 mm; 18 ct yellow gold) - Model case: 39 mm; 18 ct yellow gold; polished finish; Diameter: 39 mm; Material: 18 ct yellow gold; Bezel: domed and fluted; Winding crown: domed; Crystal: scratch-resistant sapphire; Case back: domed transparent case back with anti-reflective coating; Water resistance: waterproof to 50 metres / 165 feet; Movement: perpetual; mechanical; self-winding; Calibre: 7140; manufacture Rolex; Precision: -2/+2 sec/day after casing; Functions: centre hour and minute hands; small seconds hand at 6 o'clock; stop-seconds for exact time setting; Oscillator: Syloxi hairspring in silicon with patented geometry and high-performance Paraflex shock absorbers; Winding: bidirectional self-winding via Perpetual rotor; Power reserve: approximately 66 hours; Bracelet: leather strap; material: matt brown alligator leather; Clasp: double folding Dualclasp; Dial: intense white; Certification: Superlative Chronometer; the page does not describe this reference as using the Oyster case architecture — retrieved 2026-09-22
Not affiliated with Rolex. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.