Casio G-Shock Special Color Digital Diver's GM-6900SG-9 GM6900SG-9 200M Men's Watch The Casio G-Shock Special Color Digital Diver adds metal parts to its design, creating a revolution in personal timekeeping. Its resin case and stainless steel bezel is an unusual combination to be found among watches; while it imparts the elegance of shining metal, it also maintains a light weight. Offers a great fit and sticks to the original G-SHOCK concept.