OMEGA against Rolex
OMEGA 220.10.41.21.01.002 vs Rolex 126334
11 published specifications differ between these two, and 1 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | OMEGA Aqua Terra 150M 41mm, black dial220.10.41.21.01.002 | |
|---|---|---|
| Case | Steel, 41 mm | Oyster, 41 mm, Oystersteel and white gold. White Rolesor — combination of Oystersteel and white gold |
| Water resistance | 15 bar (150 metres / 500 feet) | Waterproof to 100 metres / 330 feet |
| Crystal | Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides | Scratch-resistant sapphire, Cyclops lens over the date |
| Dial | Black | Bright blue, with highly legible Chromalight display with long-lasting blue luminescence |
| Bracelet | Steel | Oyster, three-piece solid links, Oystersteel |
| Clasp | Foldover butterfly clasp with comfort setting | Folding Oysterclasp with Easylink 5 mm comfort extension link |
| Calibre | Calibre OMEGA 8900 | Calibre 3235, Manufacture Rolex |
| Movement | Self-winding movement with Co-Axial escapement, automatic winding in both directions | Perpetual, mechanical, self-winding; bidirectional self-winding via Perpetual rotor |
| Power reserve | 60 hours | Approximately 70 hours |
| Certification | Master Chronometer, approved by METAS | Superlative Chronometer (official chronometer certification + Rolex certification after casing) |
| Movement notes | Resistant to magnetic fields reaching 15,000 gauss. Free sprung-balance with silicon balance spring, two barrels mounted in series, and a time zone function. Rhodium-plated rotor and bridges with Geneva waves. Total product weight approximately 148 g. | Precision −2/+2 sec/day after casing. Instantaneous date with rapid setting and stop-seconds. |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Diameter
- 41 mm
Stated for one, not the other
These rows cannot be compared, because one maker publishes the figure and the other does not. An empty cell is a gap in the manufacturer's documentation, not a gap in the watch — and not a licence to fill it in from the other column.
| Thickness | 13.4 mm | not stated |
|---|---|---|
| Lug to lug | 48 mm | not stated |
| Lug width | 20 mm | not stated |
| Bezel | not stated | Fluted |
| Case back | not stated | Screw-down |
| Crown | not stated | Screw-down, Twinlock double waterproofness system |
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.
You will have to measure one of these
Lug to lug is published for the 220.10.41.21.01.002 but not for the 126334. It is the figure that actually predicts fit, so measure the 126334 yourself with callipers and say in the listing that the number is your own measurement, not the maker's.
Do not describe these the same way
150 metres on the 220.10.41.21.01.002 against 100 on the 126334. Both are more than daily life asks for, so the number is a listing-accuracy question rather than a practical one: quote each watch its own figure, and remember that neither rating survives an unserviced case by itself.
One of these is a different asset to hold
The 126334 has a gold case and the 220.10.41.21.01.002 is steel. That is not just a price difference: a precious-metal case changes what your insurer needs told, how the piece should be stored and handled, and — in some jurisdictions — whether trading it puts you under a precious-metals rule your steel stock would not. Check your own city guide before you assume they are the same transaction.
Different movements to verify and to service
The 220.10.41.21.01.002 runs the Calibre OMEGA 8900 and the 126334 the Calibre 3235, 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
220.10.41.21.01.002
- Test the time zone function properly: the hour hand should jump independently in one-hour steps without disturbing the minutes or seconds. A hand that drags the minute hand with it is a fault, not a quirk.
- Check the anti-reflective coating on both crystal surfaces. OMEGA specifies treatment on both sides, and worn or patchy coating on the inner face cannot be polished away — it needs a new crystal.
- Wind and run it for a full day to confirm the 60-hour reserve behaves. Twin barrels in series should deliver consistent amplitude rather than fading early.
126334
- Treat the fluted bezel as gold, because it is. White gold takes marks more readily than steel and the flute peaks are exactly where a careless polish rounds the profile.
- Check the flute edges are even all the way round. A bezel that has been polished shows flattened peaks on the side that sat against a desk, and the asymmetry is visible once you look for it.
- Note the clasp is an Oysterclasp rather than the Oysterlock used on the sports references — there is no safety catch, which is correct here and not a missing part.
Sources
- OMEGA official product page for reference 220.10.41.21.01.002 (Seamaster Aqua Terra 150M Co-Axial Master Chronometer 41 mm; steel) - Case: steel; 41 mm; Dial color: black; Crystal: domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides; Water resistance: 15 bar (150 metres / 500 feet); Movement: Calibre OMEGA 8900; self-winding movement with Co-Axial escapement; certified Master Chronometer approved by METAS; resistant to magnetic fields reaching 15000 gauss; free sprung-balance with silicon balance spring; two barrels mounted in series; automatic winding in both directions; time zone function; special luxury finish with rhodium-plated rotor and bridges with Geneva waves; Power reserve: 60 hours; listed with a 5-year warranty; Re-read 2026-09-23, the page additionally publishes: Between lugs: 20 mm; Lug-to-lug: 48.00 mm; Thickness: 13.40 mm; Case diameter: 41 mm; Total product weight (approx.): 148 g; Type of Clasp: Foldover butterfly clasp with comfort setting; Bracelet material: Steel — retrieved 2026-09-23
- Rolex official product page for reference 126334 (Datejust 41; Oyster 41 mm; Oystersteel and white gold) - Model case: Oyster; 41 mm; Oystersteel and white gold; Oyster architecture: monobloc middle case; screw-down case back and winding crown; Diameter: 41 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; Water resistance: waterproof to 100 metres / 330 feet; Movement: perpetual; mechanical; self-winding; Calibre: 3235; Manufacture Rolex; Precision: -2/+2 sec/day after casing; Functions: centre hour; minute and seconds hands; instantaneous date with rapid setting; stop-seconds; Oscillator: paramagnetic blue Parachrom hairspring with Paraflex shock absorbers; Winding: bidirectional self-winding via Perpetual rotor; Power reserve: approximately 70 hours; Bracelet: Oyster; three-piece solid links; Oystersteel; Clasp: folding Oysterclasp with Easylink 5 mm comfort extension link; Dial: bright blue with Chromalight display; Certification: Superlative Chronometer — retrieved 2026-09-22
Not affiliated with OMEGA or Rolex. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.