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Vintage Casio Universal Calendar 79QS-39 Men’s Digital Sports Watch JDM 1970s
■ ONE OF A KIND — THIS IS THE ONLY ONE. ONCE IT SELLS, THIS PAGE BECOMES AN ARCHIVE.
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► SELLER'S DESCRIPTION
Up for sale is a rare vintage Casio men’s digital sports watch, model 79QS-39, produced for the Japan Domestic Market (JDM) in the late 1970s. This collectible model features Casio’s “Universal Calendar” function and classic 4-button digital sports layout, housed in a polished stainless steel case with its original multi-link bracelet.
The watch is in full working condition, including timekeeping, alarm, stopwatch, calendar, and signal functions.
All parts of the watch are original, including the signed stainless steel bracelet and clasp.
The watch has signs of use and age consistent with a vintage item, but the photos best describe its physical condition.
Key Details:
• Model: Casio 79QS-39
• Era: Late 1970s
• Display: Digital LCD with alarm chronograph and universal calendar
• Condition: Full working
• Band: Original Casio-signed stainless steel bracelet
• Origin: Japan Domestic Market (JDM)
A fantastic example of Casio’s early digital sports watch design—perfect for collectors of JDM timepieces or retro tech.
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 ►► RELATED TIMEPIECES DETECTED (4)
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