Brand New Authentic Omega Constellation Automatic Chronometer 38mm Blue Dial Men's Watch Model 123.10.38.21.03.001. Stainless Steel case with Stainless Steel watch band. Folding clasp. Fixed bezel. Dial description: Blue with Silver Hands and Index Hour Markers dial. Blue dial. Automatic Chronometer movement. Push In crown. Scratch Resistant Sapphire crystal. Case size: 38mm. Transparent case back. 100 Meters - 330 Feet water resistant. 5 year WatchMaxx warranty. Also known as model: 12310382103001, 123-10-38-21-03-001, O12310382103001.