Brand: Longines Model: Ultronic (Tuning Fork / Diapazon) Movement: Longines Calibre 6312 (ESA 9162 base, Bulova Patent) Case Diameter: 40mm (Excluding crown) - Jumbo Case Era: 1970s Condition: Collector's grade, well-maintained, and high condition. ​Product Details & Condition: ​I am offering a Longines Ultronic Jumbo, a masterpiece representing one of the most unique eras in horological history. Unlike standard quartz or automatic movements, this watch utilizes tuning fork technology, ensuring a smooth, continuous sweep of the second hand. When held to the ear, the iconic and unmistakable "bee-like humming" sound is a testament to its mechanical brilliance and perfect operation. ​Working Condition: The watch is in collector's condition and is perfectly functional. It keeps excellent time, and the date function operates smoothly. It has been fully serviced and is ready for daily wear or display in a collection. ​Case: Featuring a gold-plated "Cushion Case" design. There are no deep scratches or deformations. The 40mm Jumbo diameter provides a bold and modern presence on the wrist. ​Crown: Please note that the crown is not original and has been replaced. However, it is aesthetically compatible and does not affect functionality. ​Dial: Pristine brushed gold-tone dial with applied indices. No stains or fading. ​Movement: Exceptionally clean Longines 6312 movement. The signature "humming" sound is clear and strong. ​Strap: High-quality brown lizard-print leather strap. ​Important Shipping & Customs Notice: ​Customs and Import Duties: Please be aware that any applicable customs duties, taxes, or import fees are the sole responsibility of the buyer. These charges are not included in the item price or shipping cost. Please check with your country's customs office to determine what these additional costs will be prior to purchasing. ​Note: The photos represent the current and actual state of the watch. Note that the crown is non-original.