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Toby Wickwire

A Masterpiece of Japanese Engineering: The 1973 Casio √121-S "Root" Calculator

Own a significant piece of computing history. Released in 1973, the Casio √121-S was a high-end professional desktop calculator that represented the pinnacle of Casio’s early electronic innovation. Originally retailing for a substantial 59,000 JPY—a small fortune in the early 70s—this machine was designed for serious mathematical work, featuring a then-revolutionary square root (√) function.

Technical & Aesthetic Excellence:

Luminous VFD Display: Features a brilliant 12-digit Vacuum Fluorescent Display (VFD) that emits the iconic, warm blue-green glow highly coveted by retro-tech collectors.

Mid-Century Design: The bold black and white industrial chassis, complemented by vibrant red, blue, and tactile black keys, makes it a stunning centerpiece for any modern or vintage-themed office.

Authentic Heritage: Proudly "Made in Japan" by Casio Computer Co., Ltd..

Complete Collector's Set: This listing is exceptional due to the inclusion of its original accessories:

Original Manual: A rare Japanese instruction booklet providing historical context.

Protective Soft Case: The original black branded Casio dust cover.

Integrated Power Cord: Ready for immediate use.

Condition Report:

Functionality: Fully tested and operational. The display is bright and clear, and the mechanical feedback of the keys remains excellent.

Aesthetics: Well-preserved vintage condition. Shows minor signs of careful use over its 50-year history, adding to its authentic "Showa Retro" patina.

For the connoisseur of industrial design or the pioneer of digital history, the √121-S is an essential acquisition that bridges the gap between mechanical calculation and the modern computer age.

Popular Search Keywords
Casio, Calculator, Vintage, 1973, Japan, VFD, Retro, Desktop, Electronic, Math, Computing, History, Engineering, Display, Office, Interior, Collectible, Rare, Showa, Industrial

In working order - Good condition - used with small signs of aging & blemishes - Plastic

Casio - Calculator - 1970-1980 - Vintage 1973 Casio √121-S

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Casio - Calculator - 1970-1980 - Vintage 1973 Casio √121-S

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