Breitling · Navitimer and Top Time
Breitling AB0138241C1P1 vs Breitling AB01761A1K1X1
10 published specifications differ between these two, and 8 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | ||
|---|---|---|
| Case | Stainless steel, 43 mm | Stainless steel, 41 mm |
| Diameter | 43 mm | 41 mm |
| Thickness | 13.69 mm | 13.3 mm |
| Lug width | 22 mm | 20 mm |
| Water resistance | 3 bars (30 m / 99 ft) | 10 bars (100 m / 330 ft) |
| Bezel | Bidirectional, slide rule | Fixed |
| Dial | Ice blue, as stated in the page description | Red, as stated in the page description |
| Bracelet | Alligator leather strap, black, straight, 22/18 mm | Calfskin leather strap, black, straight, 20/18 mm |
| Jewels | 47 | 40 |
| Movement notes | Chronograph to 1/4th second, with 30-minute and 12-hour totalisers. Calendar shown in a dial aperture. | Chronograph to 1/4th second with 30-minute and 12-hour totalisers. No calendar line is published for this reference. |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Crystal
- Cambered sapphire, glareproofed both sides
- Case back
- Screwed in (sapphire crystal)
- Crown
- Non screw-locked, two gaskets
- Clasp
- Stainless steel folding clasp, 18 mm
- Calibre
- Breitling 01 (Manufacture)
- Movement
- Self-winding mechanical
- Power reserve
- Approximately 70 hours
- Frequency
- 28,800 v.p.h
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.
These reach different buyers
43 mm on the AB0138241C1P1 against 41 mm on the AB01761A1K1X1. Diameter is a poor predictor of how a watch actually sits, but it is the field buyers filter on, so the two land in front of different people. Do not let one listing's photographs or copy stand in for the other.
Do not describe these the same way
The AB0138241C1P1 is rated to 30 metres and the AB01761A1K1X1 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 AB0138241C1P1 in words a buyer can act on, and do not let a template carry the AB01761A1K1X1's language onto it.
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.
AB01761A1K1X1
- Establish what came in the box and photograph all of it. On a themed edition the presentation packaging is part of what a buyer is paying for, and an incomplete set is worth materially less than a complete one.
- Check the published jewel count of 40 against whatever the seller has written. Breitling lists this calibre with three different jewel counts across the references documented here, so a mismatch means somebody copied a spec sheet from another watch.
- Confirm there is no date aperture. Unlike the other Breitling chronographs here, this reference has no calendar line on its page, and an inspector working from a general spec sheet may query a correct watch.
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
- Breitling official product page for reference AB01761A1K1X1 (Top Time B01 Chevrolet Corvette) - Caliber: Breitling 01 (Manufacture); Movement: self-winding mechanical; Power reserve: approx. 70 hrs; Chronograph: 1/4th second chronograph, 30-minute and 12-hour totalizers; Vibration: 28,800 v.p.h; Jewel: 40 jewels; Case material: stainless steel; Caseback: screwed in (sapphire crystal); Water resistance: 10 bars (100 m / 330 ft); Bezel: fixed; Crown: non screw-locked, two gaskets; Crystal: cambered sapphire, glareproofed both sides; Diameter: 41 mm; Thickness: 13.3 mm; Lug width (in-between lug): 20 mm; Strap material: calfskin leather; Strap color: black; Strap type: straight; Lug: 20/18 mm; Buckle material: stainless steel; Buckle type: folding clasp; Buckle size: 18 mm; page meta description states a red dial — retrieved 2026-09-22
Not affiliated with Breitling. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.