The Longines HydroConquest Collection are high performance watches that merges innovative technology with style. New to the collection is this all-black ceramic version, with a bezel embellished with black ceramic insert. The case is crafted entirely from ceramic material, the chemical composition is displayed on the dial. This highly durable, scratch-resistant model features a black rubber strap and is water resistant to 300m making it an ideal timepiece for sports, while it's sleek and sophisticated design can be worn every day. 43mm case. Automatic L888.3 movement. Water Resistant to 300m. Ref: L37844569. Product Information Brand: Longines Movement: Automatic Case Material: Ceramic Case Size: 43mm Type of Strap: Black Rubber Glass Material: Sapphire Crystal Dial: Black Water Resistant: 300m Gender: Mens