The Zenith El Primero Chronomaster Open 03.2040.4061/23.M2040 showcases precision and style with its open-heart gray dial, automatic chronograph movement, and stainless steel bracelet. A masterpiece of horology powered by the legendary El Primero caliber. Brand: Zenith Model: El Primero Reference: 03.2040.4061/23.M2040 Serial No.: 379233 Condition: Excellent Condition Details:  Excellent overall condition with almost no visible signs of use. Barely noticeable hairline marks may be present, but they are not visible to the naked eye. Please see photos for details. Dial Colour: Black Case Material: Stainless Steel  Starp Colour: Silver Strap material: Stainless Steel Movement: Automatic Face Width: 42 mm Approx. max circumference: 18 cm Comes With: Box, brand paper and booklet, certificate, service card