SEAMASTER AQUA TERRA 150M CO‑AXIAL MASTER CHRONOMETER 38MM "SUMMER BLUE" Color:Blue certified at the industry’s highest The PR100 s versatility certified at the industry’s highest level by the Swiss Federal Institute of Metrology (METAS) This 43 mm Worldtimer model includes a polished case in stainless steel which is integrated with the structured blue rubber strap via a solid polished link Behind which sits OMEGA’s Co Axial Master Chronometer calibre 8800 Turning the watch over reveals a stamped commemorative Seamaster logo depicting a trident bearing Poseidon and two seahorses: OMEGA’s 1956 original and the brand’s current design