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Time Traveling with Style: Rediscovering the CASIO Vintage Databank Calculator Watch in the Retro CA-500 Series

Time Traveling with Style: Rediscovering the CASIO Vintage Databank Calculator Watch in the Retro CA-500 Series

Travel back to 1976 with a watch that pays homage to the groundbreaking CASIO CQ-1, the world’s first multifunctional digital clock.

The innovative CQ-1, boasting clock, alarm, stopwatch, and calculator features all in one, captured hearts with its versatility.

CASIO now resurrects this ’70s marvel in the form of a trio of iconic CA-500 models, sporting the original CQ-1 color schemes and boasting an eight-digit calculator function.

Vintage ’70s charm meets contemporary elegance in a watch that is both striking and nostalgic.


The CQ-1, a beloved personal-sized digital clock with revolutionary functionality, was designed to seamlessly integrate into people’s daily routines. With its unique amalgamation of four functions – clock for time display, alarm for time memory, stopwatch for time measurement, and calculator for time calculation – this memorable product marked the dawn of CASIO’s combined-function innovations.

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Basic Information

Case size (L× W× H):

43.2 × 34.4 × 8.2 mm


53 g

Case and bezel material:

Resin / Chrome plated


Stainless Steel Band

Adjustable Clasp

Water resistance:

Water Resistant

Power supply and battery life:

Approx. battery life: 5 years on CR2016



Resin Glass

Compatible band size:

150 to 205 mm

Watch Features

World time:

Dual time


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


Full auto-calendar (to year 2099)

Mute feature:

Button operation tone on/off


Accuracy: ±30 seconds per month

Other features:

8-digit calculator

12/24-hour format

Regular timekeeping:

Hour, minute, second, am/pm, year, month, date, day

Water resistant
Long life battery
Self-adjustable band

Reimagined from the iconic CQ-1 combination clock-calculator, the trio of CA-500 watches pays homage to CASIO's innovation of 1976. The distinctive face design, complete with a full keypad, faithfully recreates the color scheme and intricate details of the original calculator.

The CQ-1 combination clock calculator, introduced in 1976, revolutionized personal timekeeping with its multifunctionality. Designed to streamline daily routines from waking up to time management, it boasted four essential features: clock display, alarm function, stopwatch capability, and calculator functionality. This pioneering device not only shaped CASIO's future development of combined-function gadgets but also left an indelible mark on the history of digital technology.

Retro-inspired Palette and Design

Indulge in nostalgia with a choice of three vibrant hues drawn from the iconic CQ-1 color spectrum: red, yellow, and white. Embracing the essence of the CQ-1, the design features multicolor accents, mode indicators rendered in the original typeface, and more. A green-tinted negative LCD faithfully replicates the vintage charm of vacuum-fluorescent displays from the calculator's era.

Super Illuminator for Readability in the Dark

Effortlessly tackle 8-digit computations with the calculator function. The interface seamlessly integrates a full keypad with an LCD display, epitomizing a sleek and gadget-forward aesthetic.


  • Water resistance
  • 8-digit calculator
  • Dual time
  • 1/100-second stopwatch
  • Alarm