The Omega Seamaster 120M is a dressier version of Omega's Seamaster 300M Diver, featuring a smooth bezel to tone doen its instrumental look. It was available in a variety of sizes, with different movements, in a number of dial - and metal combinations.Reference 2311.21.00 has a stainless steel case fitted with a yellow gold bezel and crown, presented on a matching bracelet. The dial is white.