Premier B01 Chronograph 42

Ref. AB0145211G1P2

Case diameter: 42 mm; Manufacturer spec
Lug-to-lug: 50 mm; Unverified
Thickness: 13.6 mm; Manufacturer spec
Lug width: 22 mm; Manufacturer spec

Retail price $9,750 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 50 mm

How the Premier B01 Chronograph 42 wears

Its lugs add 8 mm to the 42 mm case, close to the 7 mm typical across the almanac, so its diameter is a fair guide to how it wears.

On our fit model it sits best on wrists from 7" to 8.25" (17.8–21.0 cm); below 7" the lugs start to reach the edge of the wrist.

At 13.6 mm thick it is thicker than 52% of the 40 other chronograph watches we've measured, so expect it to sit tall on the wrist.

Its 22 mm lug width is one of the most common strap sizes; 42 other watches here share it, so aftermarket straps are easy to find.

Will the Premier B01 Chronograph 42 fit your wrist?

With a 50 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.

Wrist	Flat width (est.)	Fit
6"	47.2 mm	Lugs overhang
6.5"	51.2 mm	Snug, lugs near the edge
7"	55.1 mm	Ideal fit
7.5"	59.1 mm	Ideal fit
8"	63 mm	Ideal fit

Specifications

Reference: AB0145211G1P2
Collection: Premier
Status: In production
Case material: stainless steel
Crystal: sapphire
Water resistance: 100 m
Bezel: fixed
Strap / bracelet: brown alligator strap, steel folding clasp
Style: Chronograph, Dress

Movement

Caliber: Breitling 01
Type: automatic
Power reserve: 70 hours
Frequency: 28,800 vph (4 Hz)
Jewels: 47
Accuracy: COSC-certified chronometer

3 other watches use the Breitling 01

Takes 22 mm straps. See other 22 mm watches and straps.

Watches that wear the same size

Other watches within 1.5 mm of its lug-to-lug.

Same 22 mm lug width

All 22 mm watches

These take the same straps as the Premier B01 Chronograph 42.