Rare Vintage Casio AT-550 Janus Ana-Digi Touchscreen Calculator Watch JDM 1980s

Up for sale is an extremely rare vintage Casio AT-550 “Janus” men’s analog-digital touchscreen calculator watch from the Japan Domestic Market (JDM), dating to the early 1980s and powered by Module 320. This remarkable model is widely regarded as one of the earliest touchscreen watches ever produced and represents one of Casio’s most experimental and technologically ambitious designs of the era. The AT-550 features a unique hybrid “Janus” layout combining traditional analog hands with a digital LCD display. What makes this watch truly extraordinary is its pioneering touch-sensitive crystal, which allows the wearer to operate the calculator by tracing numbers and mathematical symbols directly onto the watch glass with their fingertip. Casio referred to this technology as a finger-trace recognition system, an early gesture-recognition interface decades before touchscreens became common on phones and smart devices. Unlike conventional calculator watches that rely on physical buttons, the AT-550’s transparent sensor layer is built into the crystal itself. The watch interprets the shape of numbers or symbols drawn on the surface and converts them into calculator inputs displayed on the LCD screen. This early implementation of touchscreen technology is relatively crude compared to modern capacitive displays, but it remains one of the most fascinating innovations ever produced in vintage watchmaking. Because the touchscreen system relies on a delicate sensor layer within the crystal, most surviving examples today no longer function properly. As a result, fully working examples with responsive touch capability have become exceptionally scarce and highly desirable among collectors of vintage Casio and early wearable technology. This particular example is in full working condition and all features and functions of the watch are working properly. Most importantly, the touchscreen system is fully functional and responds correctly. The watch keeps time properly and the calculator functions operate as intended when tracing numbers and symbols on the screen. All parts of the watch are original and the watch comes complete with its original Casio presentation box. The watch is in fantastic physical condition showing only minor signs of use and age. The photos best describe its overall condition and should be reviewed carefully. Examples of the AT-550 rarely appear on the market in this level of condition, especially with a perfectly functioning touchscreen and original box. It represents an important milestone in the history of wearable electronics and early touchscreen technology. Key Details: • Brand: Casio • Model: AT-550 Janus • Module: 320 • Era: 1980s • Origin: Japan Domestic Market (JDM) • Display: Analog hands with digital LCD • Special Feature: Finger-trace touchscreen calculator interface • Case Material: Stainless steel • Bracelet: Original Casio stainless steel bracelet • Condition: Fully working with fully functional touchscreen • Accessories: Original Casio presentation box included A rare opportunity to own one of Casio’s most innovative and historically significant watches from the early digital era. Ships carefully. Feel free to message me with any questions.