Vacheron Constantin New Model: Vacheron Constantin Traditionnelle Triple Calendar Series .Diameter: 40mm .The 87172/R watch fully embodies the essence of Vacheron Constantin's watchmaking with its classic three-hand design. It features a Vacheron Constantin automatic movement, visible through the transparent case back. The original Italian cowhide strap with a pin buckle adds to its elegance. The elongated hour markers paired with the railway-style minute scale beautifully showcase the brand's sophistication.