Revive your retro vibe with the Casio CA-53, a modern reinterpretation of the classic Casio Mini calculator from 1972. This watch captures the essence of the original, featuring a calculator-style LCD display and a full keypad, with green text on a negative LCD and a red mode indicator—paying tribute to the pioneering design of the Casio Mini. In addition to its nostalgic look, the CA-53 offers practical features, including a calculator for basic math, dual time, a stopwatch, and an alarm. The bio-based resin band also contributes to a more eco-friendly design. Released in 1972, the Casio Mini was the first personal calculator, known for its compact size and affordability. It became a massive success, selling six million units, and was later honoured by Japan’s National Museum of Nature and Science for its historical significance. - 43.2 × 34.4 × 8.2mm Case Size - 25g Weight - Resin Case and Bezel Material - Bio-based Resin Band - Water Resistant - Approx. battery life: 5 years on CR2016 - Resin Glass - World time: Dual time - Stopwatch - Alarm/hourly time signal: Daily alarm - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - Accuracy: ±15 seconds per month - 8-digit calculator - 12/24-hour format - Regular timekeeping: Hour, minute, second, am/pm, year, month, date, day