Casio Casiotron 31CS-10 vintage watch by Casio from 1976

Beautifully restored one of the first watches in our collection 

This will remain in our VAULT

The Casio Casiotron 31CS-10 is a highly collectible, vintage digital wristwatch released by Casio in 1976.

Manufactured in Japan, it stands as one of the definitive early entries in Casio's pioneering Casiotron line, which originally debuted in 1974 as the world's first digital watch with an automatic calendar function

• Case Design: Stainless steel build with an angular, subtly retro-futuristic square/cushion shape.
• Dimensions: 33–34 mm case width paired with an 18 mm lug/strap width.
• Display: A sharp, high-contrast single-line Liquid Crystal Display (LCD).
• Crystal: Mineral glass face featuring a distinct, stylized border typical of mid-1970s digital timepieces.
• Strap: Integrated matching stainless steel bracelet featuring a period-correct folding deployment clasp.
• Movement: Early Japan-made quartz module

• Time & PM Indicator: Displays hours, minutes, and alternating 10-second increments. It tracks PM time using a physical star symbol (\(\star \)) on the display screen.
• Automatic Calendar: A foundational tech feature for Casio at the time, keeping track of dates without manual adjustment.
• Chronograph: Includes a basic integrated digital stopwatch function.
• Display Backlight: Outfitted with a micro-bulb side-light designed to illuminate the LCD window in the dark.