First launched in 1936, the Longines 13ZN chronograph movement is still considered today as one of the most beautiful and technically interesting wristwatch chronograph movements ever produced. Designed as a flyback chronograph, where a user can quickly reset the chronograph seconds hand to zero while it’s running, almost all 13ZN-based chronograph wristwatches sold incorporated this convenient function. Not only is this true for collectors but also for watchmakers. It is no secret that the watchmakers and engineers of the venerable German brand A. Lange & Söhne took inspiration from the Longines 13ZN when creating the caliber L951.1, their acclaimed, inhouse chronograph movement launched in 1999 in the Datograph. The present lot stands out with a hardly ever seen missing feature on the 13ZN: exceptionally, it is a non flyback chronograph. Invoiced on April 8, 1943 to Mr. Wirth, the Longines agent for Switzerland, this extremely rare reference 4813 can only make the heart of the chronograph enthusiast go soaring. The overall excellent condition of the present lot, its large 36mm stepped case, and the superbly patinated vanilla-toned dial with its large subcounters provide for a vividly masculine presence on the wrist. The fact that the movement is a rare, non-flyback variant of this coveted caliber makes it an exciting watch for the connoisseur of rare chronographs.