When A. Lange & Söhne numbered its early Lange 1s, the reference told you how the watch was delivered: 101-series watches came on alligator, while 151-series watches wore an integrated precious-metal bracelet manufactured by Wellendorff. The ref. 151.021—yellow gold with champagne dial and a matching gold bracelet—is the bracelet counterpart...

Patek Philippe’s first serially produced Tourbillon also happened to be a Minute Repeater. That’s not even the most astonishing thing about the ref. 3939, though, as when it was introduced in 1992 it came to market at just 33mm. The manual calibre RTO-27-PS took up the entire caseback, with little...

The reference 25668BA is Audemars Piguet's Openworked Quantième Perpétuel in yellow gold, and the most expressive of a bloodline that begins with the 5548 of 1978. Where the 5548 introduced the thinnest self-winding perpetual calendar the world had seen to revive mechanical watchmaking in Switzerland, the 25668 stripped the movement...

Patek Philippe's 5004 is the apex of the Lemania-ébauche era—the first production Perpetual Calendar Split Seconds Chronograph, a watch Philippe Stern reportedly cast as the 'spiritual successor to the 2499.' But within that already-rarefied run, the black-dialed examples occupy their own tier, and in pink gold they are one of...

The 111.025 is a bit of an enigma: short-lived, widely collected, and in production for a flash. Most estimate total production well under 100 pieces. Most early Little Lange 1 references were produced before 2001–2002, and by the early 2000s the brand had halted production of most of them—these pieces...

The Vagabondage story began in casual conversation, not a sketch for once. A Parisian collector asked François-Paul Journe for something "like what A.-L. Breguet might make today," but with wandering hours—and the resulting watch, born for a charity auction, was such a hit that Journe spun a one-off into a...