The Zenith El Primero LIghtweight is a limited edition of 250 pieces of the brand's iconic El Primero chronograph model that has been put on a strict diet. It's caliber 400B Titanium movement features many titanium parts, making it 25% lighter than a classic El Primero at 15,9 grams. The case is done in ceramicised aluminium and carbon. The openworked dial features three differentcoloured counters. Aluminum and carbon fiber case with a nomex coated black rubber strap. Fixed carbon fiber bezel. Skeleton dial with luminous hands and index hour markers. Minute markers around the outer rim. Luminescent hands and markers. Date display at the 6 o'clock position. Chronograph - three sub-dials displaying: 60 second, 30 minute and 12 hour. Automatic movement. Scratch resistant sapphire crystal. Screw down crown. Skeleton case back. Case diameter: 45 mm.Folding clasp. Ref:10226040069R573