Rare Vintage HEUER Rattrapante / Split-Seconds Stopwatch – Valjoux 57 – Swiss Made – ± 1955 A rare and impressive vintage HEUER mechanical Rattrapante / Split-Seconds stopwatch, Swiss made This is a large professional precision timing instrument featuring a sophisticated split-seconds (rattrapante) mechanism, allowing an intermediate time to be recorded while the main timing continues. The instrument also features a 30-minute register at 12 o'clock. The movement is clearly signed HEUER and is consistent with the Valjoux Cal. 57 rattrapante family. Technical Details Brand: HEUER Type: Mechanical Rattrapante / Split-Seconds Stopwatch Country of manufacture: Switzerland Period: ± 1955 Movement: Hand-wound Valjoux Cal. 57 family, rattrapante configuration Function: Split-seconds / intermediate timing Register: 30-minute counter Case diameter: approx. 57–58 mm, excluding crown Thickness: approx. 19.5 mm Dial: White dial with black and red graduations Hands: Blued steel hands Movement: Signed HEUER Number engraved inside the inner cover: 19440 Case-back engraving: ML 51052 Condition The stopwatch is in good working condition. The start, stop, reset and split-seconds functions operate. It has not been professionally cleaned or cosmetically restored by me and is offered essentially as found, retaining its original vintage appearance, patina and signs of previous use. There are several small hand-engraved numerical markings, crossed-out numbers and other markings inside the inner covers. These appear to have been added during the working or service life of the instrument. Their exact meaning is unknown. The case and dial show normal signs of age and previous use. Please examine all photographs carefully, as the photographs form an important part of the description. ABOUT HEUER Founded in Switzerland in 1860, Heuer became internationally renowned for precision mechanical timing instruments long before the modern TAG Heuer era. The company developed increasingly sophisticated mechanical timers, stopwatches and chronographs, establishing Heuer as an important name in professional timekeeping. Its instruments were used wherever accurate mechanical timing was required, including military, industrial, sporting, technical, aviation and maritime applications. This large rattrapante stopwatch represents the era of Swiss mechanical precision instruments of the late 1950s, when sophisticated mechanical timing equipment remained essential for professional and technical applications. Shipping: Fast delivery within 1–3 days Guaranteed high-quality packaging Shipping will be carried out with insurance. U.S. Buyers: No Import Duties or Extra Fees on Delivery !