Franck Muller Aeternitas Mega 4 (2009)

Case is 42mm x 61mm with a thickness of 19.15mm, 18k white gold Cintrée Curvex, sapphire crystal, with a hand-stitched black alligator strap and 18k white gold pin buckle. Dial is silvered and guilloché, housing 23 indications across 18 hands and 5 discs — perpetual secular calendar displaying days, months, retrograde date, year up to 999, and leap year; flying tourbillon on ceramic ball bearing visible on dial; Westminster carillon grande and petite sonnerie on 4 gongs with 4 hammers; minute repeater; split-seconds chronograph with flyback function; equation of time accurate to one day every 1,000 years; dual time zone; day-night display; separate power reserve indicators for movement and striking mechanism. Movement is the in-house calibre FM3480 QPSE, automatic with two independent platinum micro-rotors – one for the movement, one for the striking mechanism – 1,483 components, 99 jewels, 91 wheels, 36 complications, five years in development and reportedly one full year to assemble each piece. Power reserve is 72hrs. Priced at approximately USD$2.7 million.