{"type":"rich","blog_title":"Watches Guide 2017","title":"High-frequency Movement - Longines Heritage Classic Ultra-Chron Carbon","height":"190","author_url":"https://blog.hatena.ne.jp/cassieye529/","categories":[],"url":"https://2017watches.hatenablog.com/entry/2025/12/10/162926","version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2F2017watches.hatenablog.com%2Fentry%2F2025%2F12%2F10%2F162926\" title=\"High-frequency Movement - Longines Heritage Classic Ultra-Chron Carbon - Watches Guide 2017\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","width":"100%","blog_url":"https://2017watches.hatenablog.com/","description":"As early as the 1910s, Longines developed a 5Hz high-frequency movement. After a series of innovations, Longines launched its first high-frequency wristwatch, the Ultra-Chron, in 1967, achieving mass production for the first time. In 1968, Longines followed up with its first high-frequency diver's w\u2026","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/c/cassieye529/20251210/20251210162822.jpg","published":"2025-12-10 16:29:26","author_name":"cassieye529","provider_name":"Hatena Blog"}