The long-selling calculator watch from Casio, the CA-53, pays homage to the Casio Mini, the world’s first personal calculator, featuring the original colors and design of this legendary, groundbreaking calculator.

The unique design of this watch face features a calculator-style combination of LCD and full keypad, incorporating design motifs from the original Casio Mini introduced in 1972. The display employs green text on a negative LCD, and the keypad uses the font from the original, with each key separated by a grid line. The use of red for the mode indicator at the upper right evokes the image of the calculator’s power light. Every detail, down to the white lines along the top and bottom of the watch face, projects retro-modern calculator style.

In addition to a calculator function that adds, subtracts, multiplies, and divides up to eight digits, the watch also comes equipped with dual time, stopwatch, alarm, and more.

World time
Dual time
Stopwatch
1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times
Alarm/hourly time signal
Daily alarm
Hourly time signal
Calendar
Full auto-calendar (to year 2099)
Mute feature
Button operation tone on/off
Other features
8-digit calculator
12/24-hour format
Regular timekeeping: Hour, minute, second, am/pm, year, month, date, day
Case and bezel material
Resin
Band
Resin Band