A truly remarkable horological reemergence, the present oversized Ulysse Nardin split-seconds chronograph wristwatch, measuring an incredible 52mm in diameter, has been treasured in a private collection since its acquisition at auction in 1988. What’s most notable is that the watch was not a converted pocket watch with soldered lugs, but a pocket watch movement cased as a wristwatch. It is the largest split-seconds chronograph wristwatch in existence.
 
Hidden beneath the hinged caseback lies an extremely high-grade, Ulysse Nardin-signed movement with Guillaume balance. A Guillaume balance with blued steel hairspring, which minimizes errors across temperatures, was the ultimate escapement for precision timekeepers and is extremely rare to find in any wristwatch. The extremely impressive downturned lugs are perfectly proportionate to the case, and the icing on the very large cake is a beautiful, well-preserved enamel dial with its serial number at 6 o’clock and bold black Breguet numerals.
 
According to the original cataloguing from 1988, the present watch was made upon special request sometime between 1918 and 1925. Another example in steel is known, with a movement number only three digits away from the present example. One of the most important wristwatches ever made by Ulysse Nardin, it is a true treasure for the discerning connoisseur.