7.75 at its largest and can be adjusted down 1 -1/2”Up for sale is a stunning, highly collectible vintage Grand Prix Swiss Time World Timer mechanical wristwatch from the 1970s. This timepiece features a classic cushion-shaped case design and a dual-crown layout, capturing the peak era of adventurous sport and dive watch aesthetics. It is in exceptional cosmetic condition and comes paired with a matching stainless steel link bracelet.Condition & FunctionalityMovement: Mechanical movement. It has been fully tested and is holding perfect, accurate timing over a 24-hour observation period.Dial & Hands: Pristine condition. The vibrant emerald green sunburst dial retains its deep color and features a clean crosshair pattern. The luminescent hands and bold geometric markers show no signs of aging or moisture damage.Bezel & World Time Scale: The internal colorful rotating world-time ring is incredibly crisp. The printed city names (including London, Paris, New York, and Geneva) are completely sharp and legible.Case & Crystals: The robust stainless steel case exhibits very minimal hairline surface wear, keeping its original lines and sharp geometry. The crystal is clear and provides an unobstructed view of the dial.Crowns: Both crowns function perfectly. One crown sets the time and date smoothly, while the secondary crown effortlessly rotates the internal time-zone ring.SpecificationsBrand: Grand Prix Swiss TimeEra: 1970sCase / Dial Size: 40.6mm diameter (measured side-to-side excluding crowns)Dial Color: Emerald Green SunburstComplications: Date window at 3 o'clock, Internal rotating World Time scaleCase Material: Stainless Steel with a gold-tone textured accent ringBand: Stainless Steel link bracelet