Pre-owned Omega Seamaster Ploprof 1200M ref 227.32.55.21.03.001 (2024). 2023 marked the Seamaster’s 75th anniversary, an occasion Omega commemorated with a special Summer Blue collection, featuring all of the collection’s variants with different blue gradient dials in hues based on their respective depth ratings. The curious Ploprof, with its robust 55mm x 45mm monobloc case design and 1,200-meter depth rating, is inspired by a watch made by Omega back in the 1970s. It features Omega’s new proprietary O-MEGASTEEL, a nickel-free alloy with a brighter color to it and that is 40% to 50% stronger than traditional stainless steel finishes, as well as a Summer Blue gradient dial, a case back decorated with an image of Poseidon, and a unique bezel made from sapphire crystal that is varnished to achieve the look you see here. The real star of the show here is the case design, which features a left-hand screwed-in crown and a 2 o’clock security pusher that releases the bi-directional bezel. Shop OMEGA Seamaster Collection