Breitling against OMEGA
Breitling AB0138241C1P1 vs OMEGA 310.30.42.50.01.001
14 published specifications differ between these two. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | OMEGA Speedmaster Moonwatch Professional 42mm, Hesalite310.30.42.50.01.001 | |
|---|---|---|
| Case | Stainless steel, 43 mm | Steel, 42 mm |
| Diameter | 43 mm | 42 mm |
| Thickness | 13.69 mm | 13.54 mm |
| Lug width | 22 mm | 20 mm |
| Water resistance | 3 bars (30 m / 99 ft) | 5 bar (50 metres / 165 feet) |
| Crystal | Cambered sapphire, glareproofed both sides | Hesalite crystal with OMEGA logo in the centre |
| Dial | Ice blue, as stated in the page description | Black |
| Bracelet | Alligator leather strap, black, straight, 22/18 mm | Steel |
| Clasp | Stainless steel folding clasp, 18 mm | Foldover clasp with comfort setting |
| Calibre | Breitling 01 (Manufacture) | Calibre OMEGA 3861 |
| Movement | Self-winding mechanical | Manual-winding chronograph movement with Co-Axial escapement |
| Power reserve | Approximately 70 hours | 50 hours |
| Frequency | 28,800 v.p.h | 3 Hz |
| Movement notes | Chronograph to 1/4th second, with 30-minute and 12-hour totalisers. Calendar shown in a dial aperture. | Resistant to magnetic fields reaching 15,000 gauss. Free-sprung balance with silicon balance spring; rhodium-plated finish with bridges carrying straight Geneva waves. Total product weight approximately 134 g. |
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.
| Lug to lug | not stated | 47.5 mm |
|---|---|---|
| Bezel | Bidirectional, slide rule | not stated |
| Case back | Screwed in (sapphire crystal) | not stated |
| Crown | Non screw-locked, two gaskets | not stated |
| Jewels | 47 | not stated |
| Certification | not stated | Master Chronometer, approved by METAS |
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 310.30.42.50.01.001 but not for the AB0138241C1P1. It is the figure that actually predicts fit, so measure the AB0138241C1P1 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
The AB0138241C1P1 is rated to 30 metres and the 310.30.42.50.01.001 to 50. 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 AB0138241C1P1 in words a buyer can act on, and do not let a template carry the 310.30.42.50.01.001's language onto it.
Two different ownership conversations
The AB0138241C1P1 is self-winding and the 310.30.42.50.01.001 is hand-wound. That changes what a buyer needs telling at handover, and it changes intake: a hand-wound watch has no rotor to mask a tired mainspring, and a stopped quartz watch is usually a battery rather than a fault.
One survives the weekend and one does not
70 hours on the AB0138241C1P1 against 50 on the 310.30.42.50.01.001. Below about sixty hours a watch left off the wrist from Friday is stopped by Monday. Wind both fully at intake and confirm they reach the stated figure — a short reserve leaves a tired barrel nowhere to hide, and it is the kind of fault a buyer reports in week two.
What to check on each
AB0138241C1P1
- Tell the buyer the water resistance is 3 bars before the watch ships. That is 30 metres with a crown that does not screw down, and a buyer who assumes a chronograph is a swimming watch will find out at your expense.
- Turn the slide rule bezel through a full revolution and check it moves freely in both directions without slipping. It is bidirectional by design here, and a computation bezel that binds has lost its function.
- Run the chronograph for a full twelve hours and read all three registers. This calibre records quarter seconds, 30 minutes and 12 hours, so a shorter test only exercises part of the mechanism.
310.30.42.50.01.001
- Identify the crystal before anything else. Hesalite is a plastic: it scratches easily, polishes out with a cloth and compound, and carries a small OMEGA logo etched at its centre. A sapphire crystal on this case means you are looking at a different reference number.
- Do not treat scratches on a Hesalite crystal as damage in the way you would on sapphire. They are expected and largely removable, and pricing them as permanent faults misreads the material.
- Check the 3861 is what is fitted. The Moonwatch has used several calibres across its history, and the Master Chronometer 3861 is the current one — papers and caseback should agree.
Sources
- Breitling official product page for reference AB0138241C1P1 (Navitimer B01 Chronograph 43) - Caliber: Breitling 01 (Manufacture); Movement: self-winding mechanical; Power reserve: approx. 70 hrs; Chronograph: 1/4th second, 30 minutes, 12 hours; Vibration: 28,800 v.p.h; Jewel: 47 jewels; Calendar: dial aperture; Case material: stainless steel; Caseback: screwed in (sapphire crystal); Water resistance: 3 bars (30 m / 99 ft); Bezel: bidirectional, slide rule; Crown: non screw-locked, two gaskets; Crystal: cambered sapphire, glareproofed both sides; Diameter: 43 mm; Thickness: 13.69 mm; Lug width (in-between lug): 22 mm; Strap material: alligator leather; Strap color: black; Strap type: straight; Lug: 22/18 mm; Buckle material: stainless steel; Buckle type: folding clasp; Buckle size: 18 mm; page meta description states an ice blue dial — retrieved 2026-09-22
- OMEGA official product page for reference 310.30.42.50.01.001 (Speedmaster Moonwatch Professional Co-Axial Master Chronometer Chronograph 42 mm; steel on steel) - Case: steel; 42 mm; Dial color: black; Crystal: hesalite crystal with OMEGA logo in the centre; Water resistance: 5 bar (50 metres / 165 feet); Movement: Calibre OMEGA 3861; manual-winding chronograph 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; rhodium-plated finish with bridges carrying straight Geneva waves; Power reserve: 50 hours; Frequency: 3 Hz; the watch is listed with a 5-year warranty and as Swiss Made; Re-read 2026-09-23, the page additionally publishes: Between lugs: 20 mm; Lug-to-lug: 47.50 mm; Thickness: 13.54 mm; Case diameter: 42 mm; Total product weight (approx.): 134 g; Type of Clasp: Foldover clasp with comfort setting; Bracelet material: Steel — retrieved 2026-09-23
Not affiliated with Breitling or OMEGA. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.