ONSA Grand Sport – 17 Jewels – Shockproof – Antimagnetic – Vintage Swiss Manual Wind A charming vintage ONSA Grand Sport wristwatch featuring an attractive textured silver-tone dial, applied gold-tone Arabic numerals and distinctive mid-century styling. The dial is signed ONSA – Grand Sport – 17 Jewels and Shockproof – Antimagnetic. It features a finely textured central section, applied Arabic numerals at the even hours, triangular hour markers and gold-tone hands with central seconds. The watch has a classic 32 mm case with pronounced angular lugs and a stepped bezel, giving it considerably more presence on the wrist than its dimensions might suggest. The caseback is signed ONSA, Incabloc, Swiss Made, Stainless Steel Back and Waterproof. Due to the age of the watch, any original water resistance should no longer be assumed. It is fitted with a black leather strap. Specifications Brand: ONSA Model: Grand Sport Movement: Manual winding Jewels: 17 Functions: Hours, minutes and central seconds Dial: Textured silver-tone Case back: Stainless steel Crystal: Acrylic Features: Shockproof, antimagnetic, Incabloc Strap: Black leather Swiss Made Period: Vintage / mid-20th century Dimensions Case diameter: 32 mm Lug-to-lug: 40 mm Thickness: 9 mm Lug / strap width: 16 mm Condition The watch is in vintage condition with visible signs of age and use. The dial shows natural patina and some age-related discolouration. The hands also show visible oxidation/patina. The case, bezel and lugs display scratches, surface wear and plating loss consistent with the age of the watch. The textured dial, applied numerals and characteristic case design give this ONSA Grand Sport considerable vintage charm and make it an attractive example of a lesser-seen Swiss watch brand. Please study the photographs carefully as they form an important part of the description. As with all vintage watches, water resistance is not guaranteed. The watch has been checked and tested for a minimum of 48 hours before shipping. It has not been serviced by the seller, and due to its vintage nature, no guarantee can be given regarding future accuracy or performance.