Now available at auction from Second Vintage This sought-after Longines Ultra-Chron presents a compelling opportunity for collectors focused on high-beat mechanical precision. Powered by the renowned automatic Caliber 431, this circa 1970 timepiece features the distinctive Ultra-Chron branding on both the dial and the decagonal caseback medallion. With its well-proportioned stainless steel case and honest patinated character, this watch offers a highly desirable configuration of a historically significant model. Brand: Longines Model: Ultra-Chron Reference Number: 8301 8 Serial Number: 51425239 Movement: Automatic Caliber 431, 25 Jewels Dial: Silver sunburst finish with noticeable spotting and patina Case Size: 37mm (excluding the crown) Case Material: Stainless steel Production Year: circa 1970 Condition: Good vintage condition. Timegrapher: +4+6s/day with strong amplitude, performing remarkably well. Dial and Hands The silver sunburst dial has developed a highly patinated character, featuring noticeable spotting distributed across the surface. Applied faceted indices mark the hours, accompanied by a framed date window positioned at 3 o'clock. The stick hands feature black inserts and display minor oxidation alongside traces of dirt visible under magnification, remaining entirely consistent with the aged aesthetic of the dial. Case and Crystal The 37mm stainless steel case and smooth integrated steel bezel display honest wear, with moderate scratches consistent with age. The case retains classic 1970s proportions and features a domed acrylic crystal that presents clear visibility with only minor surface scratches. On the right side, the Longines crown is in good condition, retaining defined fluting and clearly signed with the brand name and winged hourglass logo. The decagonal screw-down caseback is a notable feature, proudly displaying the signature Ultra-Chron medallion. Movement Inside the case beats the Longines high-beat automatic Caliber 431. The movement presents a clean appearance and features detailed engravings, noting 25 jewels and adjustment to four positions and temperature. The rotor shows minor edge wear. The timegrapher records +4+6s/day with strong amplitude. Exhibiting remarkable accuracy and consistency, performing brilliantly for a vintage timepiece. Strap The watch is fitted with a brown leather strap featuring white contrast stitching. The strap appears unworn or very lightly used and is secured by an unbranded steel buckle. Condition Good vintage condition. The stainless steel case and integrated bezel exhibit moderate, age-related scratches and honest wear. The silver sunburst dial shows a distinctly patinated surface with noticeable spotting, while the hands display minor oxidation. The acrylic crystal has minor surface scratches. Supported by the recorded timegrapher result, the movement is performing very strongly. Dimensions The case measures 37mm in diameter, excluding the crown. Remarks This sought-after high-beat Ultra-Chron model stands out with its distinctive dial and caseback branding. Retaining its signed Longines crown and classic proportions, it is a highly attractive target for enthusiasts of vintage high-frequency movements. History The Longines Ultra-Chron series is well-regarded by collectors for its high-beat movements and historical significance in the race for mechanical accuracy. Introduced during a highly competitive era of watchmaking, the Ultra-Chron was designed to offer exceptional precision and reliability. Today, these models remain highly respected for their technical achievements and distinctive styling, representing a proud chapter in the Longines heritage. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and securely packaged, then shipped with tracking and insurance for your peace of mind. We use fast express shipping, with typical delivery within 1–4 business days, depending on the destination. Please note that vintage watches may show minor signs of wear, aging, or imperfections, which are considered normal for watches of this age. We kindly ask you to review all photos carefully before bidding. We photograph each watch from multiple angles to provide the most accurate representation possible, and the photos form an important part of the description. The timegrapher assessment if provided is seen as an indication of the movement’s condition under fully wound testing conditions. As with all vintage watches, results may vary in daily use. If you have any concerns regarding functionality or defects after delivery, please contact us within 3 days of receiving the watch so we can assist you. As with all used watches, water resistance is not guaranteed. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: LON-AXX-0007