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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
■ THIS EXACT PHOTOGRAPHED WATCH IS ONE OF 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.
► MANUAL ARCHIVECasio module 31 manual PDFs

► ARCHIVE FILE: CASIO — BRAND HISTORY

Casio brought an electronics company's imagination to the wrist, moving from calculators to the calendar-equipped Casiotron in 1974. G-Shock toughness, Databank utility, and affordable icons such as the F-91W turned the company into a digital-watch giant whose early modules and resin-cased designs are now a distinct collecting field.

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

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