The concept of the analog-digital (ana-digi) combination is also deeply rooted in Casio's history. These watches combine traditional analog hands with a digital display, offering the best of both worlds: the intuitive glance of an analog watch and the precise, multi-functional capabilities of a digital one. Casio introduced its first ana-digi models, such as the "Janus" in the early 1980s, named after the two-headed Roman god, symbolizing its dual nature. This combination proved incredibly popular, offering versatility for both casual and more technical needs.