In the 1950s Patek Philippe began a gradual process of design experimentalism which moved gradually away from the standard round cases predominant for the previous 2 decades. This process brought eventually to the world whimsical creations such as the Gilbert Albert-designed pieces the 2442 “Marylin Monroe” or the 2441 “Tour Eiffel”. The obscure reference 2560 is indeed a child of this time the experimentalism evident with the unusual hooded lugs employed on this case.