Reference Number: 03215040053M2150 Stainless steel case & bracelet. Blue sunray dial with tachymeter scale on the flange. Three colored subdials of anthracite, grey and silver sunray. Faceted polished hands & applied indexes with Superluminova. The Famous El Primero Chronograph stop/watch: Large red central seconds hand (with the Zenith star logo as a counterweight). 30 minute sub-dial counter located at the 3 o'clock position. 12 hour sub-dial counter located at the 6 o'clock position. Running seconds sub-dial located at the 9 o'clock position. Date display window located between 4 and 5 o'clock. Zenith El Primero Caliber 400 B, beats at 36,600 vph, 31 Jewels, 278 components & an approximate power reserve of 50 hours. Case Shape Round Case Dimensions 38mm Case Thickness 12.45mm Case Material Stainless Steel Dial Color Blue Crystal Anti-Reflective Scratch Resistant Sapphire Screw-in Crown No Water Resistance 100m/330ft Case Back Transparent Band Material Stainless Steel Color/Finish Brushed & Polished Clasp Push Button Folding Clasp