Patek Philippe Annual Calendar Travel Time Reference. 5326G-001 Let's start with the better of the two, the Patek Philippe Annual Calendar Travel Time. As mentioned, the combination of these two complications is a first for the brand. But if there's one brand that makes both complications known, it's Patek Philippe. The brand launched its annual calendar in 1996, and it has since become a complication that can be seen in a wide variety of watches from different brands and at different price points.