Vacheron Constantin Overseas moon phase retrograde date

Vacheron Constantin's Overseas moon phase retrograde date, reference 4000V/210A-B911, has a steel case measuring 41 mm across and 10.48 mm thick. The blue dial carries luminous hands and indices, along with a retrograde date display and gold moon phases set against a starry sky pattern. A sapphire crystal covers the dial, and a sapphire caseback on the reverse shows the movement. Inside is the self-winding calibre 2460 R31L/2, carrying the Hallmark of Geneva and offering 40 hours of power reserve. The steel bracelet closes with a folding clasp in steel, and thanks to an interchangeable system it can be swapped for leather or rubber straps. The folding clasp secures a case that holds its rating to 50 metres.