The sophisticated True North Perpetual watch fulfils an ambition to create a wristwatch inspired by the earth in its role as a cosmic clock. Powered by a hand-wound movement with a seven-day power reserve, this complicated watch is equipped with a perpetual calendar taking account of leap years, a moon-phase display based on a 29.5 day lunar cycle, a 24-hour time zone indication capable of also showing the mean solar time, and finally with a double equation of time function. And thanks to a rotating longitude correction scale it indicates the true solar time for any given place as well as the true geographical North.