Seiko Slim Turtle 7548
In 1978, Seiko introduced the first 150 m diver’s watch with quartz movement in history, the 7548 Slim Turtle, alongside the 600 m and 300 m quartz divers launched the same year. In this guide, we will examine all the known variants of the 7548 divers, produced until the mid-1980s. Index The origins of the Seiko Slim Turtle The first Slim Turtle series, based on the quartz caliber 7548, was …