An excellent example of a transitional style in which the lines have become gentler and more undulating and the rigid geometry of the preceding style has softened. The curved lines are harmoniously superimposed with a result that is both elegant and innovative. A very similar model was produced by Patek Philippe during the same period under the Reference 1402. Yet another example of the ways in which the two Genevan watch manufacturers strove to remain at the forefront of both technology and design.