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Rare Vintage Casio 31QS-12 Men’s Digital Calendar Stopwatch Sports Watch JDM 70s

DIRECT PRICE — SAVE 10%
EBAY PRICE$65.00
DIRECT -10%$58.50
■ ONE OF A KIND — THIS IS THE ONLY ONE. ONCE IT SELLS, THIS PAGE BECOMES AN ARCHIVE.
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BRAND:
Casio
UNIT CONDITION:
Pre-owned - Good
► SELLER'S DESCRIPTION
Up for sale is a rare vintage Casio 31QS-12 men’s digital calendar stopwatch sports watch, produced in the late 1970s for the Japan Domestic Market (JDM). This early Casio digital model represents one of the brand’s classic designs from its pioneering quartz era, combining reliability, simplicity, and functional style. The watch is in full working condition, and all features and functions operate properly, including the time, calendar, stopwatch, and light. All parts of the watch are original, including the stainless steel case, case back, bracelet, and Casio-signed clasp. The watch shows signs of use and age, consistent with its vintage nature, but the photos best describe its physical condition. Key Details: • Model: Casio 31QS-12 • Era: Late 1970s • Market: Japan Domestic Market (JDM) • Display: Digital Quartz with Calendar and Stopwatch • Movement: Quartz • Features: Time, calendar, stopwatch, light • Condition: Full working order • Originality: All parts original • Bracelet: Original Casio stainless steel bracelet with signed clasp • Case Material: Stainless steel A beautifully preserved and fully functional early digital Casio—an excellent piece for collectors and vintage watch enthusiasts alike. Ships carefully. Feel free to message me with any questions.

► ARCHIVE FILE: CASIO — BRAND HISTORY

Casio began not with watches but with calculation. Tadao Kashio founded Kashio Seisakujo in Tokyo in 1946, and with his three brothers developed the 14-A in 1957, the world's first compact all-electric relay calculator, incorporating the business as Casio Computer Co. that same year. The move into watchmaking came in November 1974 with the Casiotron, a digital watch whose claim to fame was an automatic calendar that knew how many days each month had, a small feat of logic that announced how an electronics firm would approach timekeeping.

Read the full Casio story — and shop all Casio watches ►

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