Reference UB0134101B1U1 is the two-tone Chronomat B01 42, and this Breitling Chronomat B01 42 two-tone replica pairs a stainless steel case with red-gold-tone accents on the bezel, crown and bracelet center links, all framing a slate-grey anthracite dial with dark navy sub-dials. The bicolor construction blends the sport character of the steel Chronomat with the warmth of red gold, creating a more formal reading than the all-steel references while keeping the functional rider-tab bezel. The Chronomat overview, from steel to red gold, shows where the two-tone models fit in the range.

Specifications

• Model: Chronomat B01 42
• Reference: UB0134101B1U1
• Case size: 42 mm
• Case: stainless steel with red-gold-tone bezel, crown and pushers (genuine: steel and 18k red gold)
• Dial: slate-grey anthracite sunburst, three dark navy sub-dials, red-gold-tone hands and indices, red chronograph seconds hand, date at 6
• Bezel: unidirectional ratcheting, rider tabs, red-gold-tone finish (genuine: 18k red gold)
• Crystal: sapphire, anti-reflective coating
• Bracelet: two-tone Rouleaux, steel with red-gold-tone centre links
• Movement: clone Cal. B01, automatic chronograph (column wheel, vertical clutch), 28,800 vph
• Power reserve: 55 hours (genuine Cal. B01: 70 hours)
• Water resistance: 50 m (genuine: 200 m)
• Functions: hours, minutes, seconds, chronograph, date at 6 o’clock

The two-tone treatment distributes a red gold tone across the bezel, crown, pushers and bracelet center links, echoing the warm tone across multiple surfaces rather than concentrating it. The anthracite dial with red-gold-tone applied indices ties the palette together and keeps the watch from reading as a single-material piece.

Clone Cal. B01 and the Red Chronograph Hand

A clone Cal. B01 self-winding chronograph sits inside, keeping 28,800 vibrations per hour and driving the three-register layout with a date aperture at 6 o’clock, while a red chronograph seconds hand crosses the grey dial. The red-gold-tone rider-tab bezel turns in one direction only and ratchets as it moves. For an all-steel 42 mm with a warmer dial, see the copper-dial Chronomat 42mm AB0134101K1A1. More configurations are in the Chronomat collection.

Breitling Chronomat B01 42 Two-Tone Replica: Anthracite, Not Blue

The bicolor Chronomat bridges sport and dress contexts better than either the all-steel or the all-gold references. The steel keeps weight and durability reasonable while the red-gold-tone accents add formality, and the anthracite dial gives the whole package a contemporary edge. This anthracite two-tone Chronomat is the versatile mixed-metal option in the 42mm Chronomat line.