Breitling Top Time B31

Breitling's Top Time B31, reference AB3113A71C2X1, has a steel case measuring 38 mm across and 10.31 mm thick. The blue dial sits under a cambered sapphire crystal, glareproofed on both sides. Inside is the self-winding calibre B31, a manufacture movement with a power reserve of approximately 78 hours. The watch is a chronometer and shows the date through a dial aperture, with central seconds for precise timing. Luminous hands aid readability, and a sapphire display back reveals the movement. A blue calfskin leather strap closes with a steel tang-type buckle. The screwed-in caseback helps hold water resistance to 100 metres.