The Professional B2 is using the Breitling 42 caliber which is a combination between the ETA and Kelek models having an automatic movement with a COSC-certified chronometer. It has 38 jewels and runs at high frequency of 28,800 vph. It is like a chronograph with three counters: small seconds located at 3, 3-hour counter at 6, and a 10-minute counter positioned at 9. The second counter is running from the center of the dial and the calendar display is located between 4 and 5.The case is manufactured of stainless steel, yellow gold, and white gold with a diameter of 43.5mm and 15mm thickness. The sapphire crystal is flat with anti-reflective on both sides.

The bezel is knurled ring and optionally can be turned bi-directionally which is integrated with the flange along the dial. There is a luminescent dot marker at 12 and a scaling for 360°. The case back is screwed down with embossed Breitling logo. The ater resistance is up to 100m.

The dial are black, silver, and blue. The silver dials use slate-gray sub-dials and the black and blue dials use silvered sub-dials. The flange may be rotated bi-directionally with the bezel and has a tachometer scale measurable with the slide-rule having a half-minute track with 1/5 second division.

The rhodium-plated sword-shaped central hands and sub-dial hands are all with the central hands being luminescent. There are luminescent dotted markers with rhodium-plated as well as an Arabic numeral 12.

For the yellow gold, the central hands, sub-dial hands, and the dotted markers’ circumference are using yellow gold instead of rhodium-plated.

The watch comes in either the Fighter bracelet or straps that are made of leather, crocodile, buffalo leather or Diver Pro.

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