This is a Steinhart OVM MK1 VINTAGE MILITARY OCEAN ONE serial number engraved model. Models with engraved serial numbers are overwhelmingly rare in the market, so many people are likely looking for them. This is an authentic vintage item purchased at auction from a watch buying specialist. I am selling it because I need money. As it is a vintage item, there are minor scratches, but it is generally in good condition. Model: OVM MK1 VINTAGE MILITARY OCEAN ONE. ETA 2824-2 Case: Approximately 42mm Dial Color: Black Belt Color: Green (Manufacturer's Introduction) The origins of the maison date back to the early 1900s with the Schlenker and Kienzie company. Currently, ideas and designs are created at the headquarters in Augsburg, Germany. Production takes place in Switzerland, using the highest technology and only high-performance movements, with each piece carefully crafted. The sporty luxury of the "VINTAGE MILITARY OCEAN ONE" sets it apart from other diver watches. Its robust design guarantees the highest durability and outstanding quality.