The Calibre Royal movement in the Royal Grand Sport, which was developed entirely in-house by Pequignet at its workshops in Morteau, France, offers a number of significant features, such as a triple instantaneous day and date jump, as well as date setting via the crown with no prohibited times for setting the date. Round 46mm case in stainless steel, self-winding movement, 21,600 vibrations per hour, 88-hour power reserve, large-scaled chestnut alligator leather strap with pin buckle.
Source: Europa Star April - May 2012 Magazine Issue