A FINE & RARE GENTLEMAN'S PLATINUM ZENITH EL PRIMERO CHRONOMASTER TRIPLE CALENDAR MOONPHASE CHRONOGRAPH WRISTWATCH CIRCA 2000, REF. 39.0240.410/01, WITH BOX & PAPERS D: Silver guilloche dial with white gold Breguet numerals, triple register recording hours, minutes & continuous seconds, moonphase display, month, day & date apertures, tachymetre scale. M: Automatic chronometer movement signed Zenith ChronoMaster & numbered, calibre 410. C: Circular stepped case, signed Zenith ChronoMaster, numbered & hallmarked, original crown & pushers, case diameter measures approx. 40mm. S: Original Zenith blue leather strap & platinum pin buckle.