The Patek Philippe references 3738 and 5738 represent the evolution of the manufacture's iconic Golden Ellipse, one of the most distinctive and enduring designs in Patek Philippe's history. Introduced in 1977, the reference 3738 refined the original Golden Ellipse concept with a slimmer profile and the ultra-thin automatic Calibre 240, whose off-centre micro-rotor allowed the watch to retain its elegant proportions. Inspired by the Golden Ratio, the softly elliptical case, minimalist dial and understated styling established the 3738 as the definitive modern expression of the Golden Ellipse, offering a timeless alternative to the traditional round dress watch.

The reference 5738 succeeded the 3738 in 2008, preserving the collection's unmistakable silhouette while increasing the case size to suit contemporary tastes and introducing subtle refinements to the dial and case proportions. Retaining the ultra-thin Calibre 240, the 5738 continued the Golden Ellipse tradition of combining exceptional mechanical craftsmanship with minimalist elegance. Produced in precious metals and serving as the foundation for a number of Rare Handcrafts creations, the 5738 demonstrates the enduring versatility of the design. Together, the 3738 and 5738 illustrate the remarkable continuity of the Golden Ellipse collection, proving that one of Patek Philippe's most distinctive designs remains as relevant and sophisticated today as when it was first conceived.