Seikosha SEIKO Cronos Seahorse, in working condition. It runs without problems (accuracy not confirmed). It generally keeps time. This is Seiko Cronos's first waterproof watch, manufactured at Kameido Seikosha in 1959. The Seahorse mark, indicating the waterproof function, is on the back cover (it's quite faded). Watch case width: approx. 3.5cm (excluding the crown) The belt is an aftermarket product. The movement is clean, and the balance wheel swings briskly. The crystal has fine cracks, typical of old plastic crystals. The dial has stains and soiling due to aging. The metal parts have minor scratches. The engraving on the back cover is faint and difficult to see. Water resistance has not been tested. There are no accessories such as a box. For those who understand antique and vintage watches, it is currently running, but the lifespan of the watch is unknown. Please understand that we cannot guarantee its operation.