Ulysse Nardin , the company, was founded in 1846. Since the founding of the company, Ulysse Nardin was known for their high-quality and high-accuracy craftsmanship, so much so that they became known worldwide for their Marine Chronometers, the most accurate mechanical clocks ever made, achieving a precision of around a tenth of a second per day. The Ulysse Nardin Astrolabium, entered into the Guinness Book of Records in 1989 as the most complicated
replcia watches ever made with 21 complications, indicates the position of the sun, the moon and the stars in the sky at any given hour as seen from Earth, as well as sunrise and sunset, dawn and dusk, moonphases, moonrise and moonset, eclipses of sun and moon, the month and the day of the week.