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Rare Vintage Casio B812 Men’s Digital Sports Watch Module 58 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 B812 men’s digital sports watch, powered by Module 58 and produced exclusively for the Japan Domestic Market (JDM) during the 1970s. This model represents one of Casio’s early lithium-powered digital watches, reflecting the brand’s early commitment to innovation and precision craftsmanship during the formative years of digital watchmaking.
This example features its original stainless steel case and is fitted with an aftermarket stainless steel strap.
The watch is in full working condition, and all features and functions operate properly. It is in good physical condition with signs of use, maintaining a well-preserved appearance for its age. The photos best describe its overall physical condition.
Key Details
• Brand: Casio
• Model: B812
• Module: 58
• Era: 1970s
• Origin: Japan Domestic Market (JDM)
• Movement: Digital Quartz (Lithium-powered)
• Case Material: Stainless Steel
• Strap: Aftermarket stainless steel strap
• Condition: Good physical condition with signs of use; full working order
A beautifully preserved early Casio digital from the 1970s — a standout example of the brand’s early design language and engineering excellence.
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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