RELIDE Automatic “Bidynator” – Vintage Swiss Watch – Felsa 690 – 25 Jewels –1940s-1950s Offered here is a refined and historically important vintage Swiss wristwatch, branded RELIDE, powered by the well-regarded Felsa 690 Bidynator automatic movement — a true milestone in early automatic watchmaking. Highlights Original Swiss automatic movement – Felsa 690 “Bidynator” 25 jewels (higher-grade execution) Bi-directional rotor winding system Classic mid-century design with natural patina Elegant and wearable case of approximately 33 mm (without crown) Movement – Felsa 690 Bidynator This watch houses the notable Felsa 690, part of the Bidynator family introduced in the 1940s. Key features: Early automatic movement with bi-directional winding Frequency: 18,000 vibrations/hour Power reserve: approximately 42 hours Robust and historically significant construction Widely used by numerous Swiss brands during the post-war era The 25-jewel configuration represents a more refined version, designed for improved longevity and smoother operation. Dial & Aesthetics Original dial with attractive, even aging Applied Arabic numerals and indices Signed: RELIDE – Waterproof – Incabloc Subtle patina adds authenticity and vintage appeal Dauphine-style hands consistent with the period Case Stainless steel case back engraved: Waterproof – Incabloc – Anti-magnetic Swiss Made Visible wear consistent with age Diameter: 33 mm excluding crown and 41 mm lug to lug. Strap Fitted with a genuine leather strap Used condition, still functional and visually appropriate Condition Good overall vintage condition Movement appears clean and complete The watch is running Service history unknown Signs of age present on case but overall is in good condition for its age. Historical Note The Felsa Bidynator system introduced efficient bi-directional rotor winding, a concept that became standard in modern automatic watches. This makes the present piece not only aesthetically appealing but also relevant from a technical and historical perspective. Conclusion A well-preserved vintage Swiss automatic watch featuring an important early automatic movement. Suitable for collectors, enthusiasts, or as a representative piece of mid-20th century horology. The watch will be carefully packed and shipped with tracking. Please review all photos carefully, as they form an integral part of the description. Fast delivery 2-3 working days with DHL Express!!