Vacheron Constantin Overseas self-winding

Vacheron Constantin's Overseas self-winding, reference 4520V/210A-B128, is a steel watch measuring 41 mm across and 10.69 mm thick. The sunburst blue dial has a date aperture at 3 o'clock and a central seconds hand, with luminous hands and indices for low-light reading. It sits under a sapphire crystal, and a sapphire caseback shows the movement. That movement is the self-winding calibre 5100, carrying the Hallmark of Geneva and running with a 60-hour power reserve. A screw-down crown protects the case, and the steel bracelet closes with a folding clasp that also accepts leather or rubber straps. Water resistance reaches 150 metres.