Bentley Motors uses the Breitling 25B caliber that is an automatic movement with a COSC-certified chronometer. It has 38 jewels and runs at high frequency of 28,800 vph.
It has a chronograph with three counters: the 1/8th small seconds located at 3, 6-hour counter at 6, and a 15-minute counter positioned at 9. It also has the 30 second counter running from the center of the dial. Its calendar display is located between 4 and 5.

The case is made of stainless steel, yellow gold, white gold, and platinum with a diameter of 46.8mm and 15.25mm thickness. Its sapphire crystal is curved with anti-reflective on both sides.
Its bezel is knurled and has deep grooves. It can be turned bi-directionally which is integrated with the flange along the dial. It uses screw-down crown that is case protected. Its caseback is screwed down with engraving of the Bentley logo. Water resistance is up to 30m.

The dial comes in black, blue, silver, bronze, and Laurel Green (for the stainless steel case only). It has a silvered flange that can be rotated and has a fixed and variable tachometer scale measurable with the slide-rule.
It has a half-minute track with ¼ second division. Its central hands and subdial hands are all rhodium-plated with the central hands being luminescent. There are also luminescent dot markers around the dial.
It comes in either the Speed bracelet or straps that is made of leather, crocodile or buffalo leather.
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