Not every timepiece from the world’s greatest watchmaker fits neatly into the mold of an overarching theme or collection. While we love a simple Calatrava, a sporty Aquanaut, or a complicated perpetual calendar as much as the next guy, the oddball, more overlooked and usually limited-production, shaped watches made by the maison in second half of the 20th century are often some of the most innovative and charming in the brand’s oeuvre.Take this piece for example. Dating to circa the 1970s, this Reference 3563-3 features a solid 18k white gold construction, with a 35mm case with textured finishing and matching integrated woven bracelet, an absolutely stunning blue guilloche 'sigma' dial with applied white gold indices and a matching handset, and Patek's Calibre I-350 automatic winding movement within.Fantastic.There’s nothing wrong with a classic Calatrava if what you’re after is a handsome, reliable dress watch. But for those in search of something a bit…different, this piece is absolutely worth looking at.Check it out today!*Due to the design of this bracelet, sizing alterations may require custom work. Lead time after measurements are established is 4-6 weeks.*