Rare Vintage Seiko RC-4000 Men’s Digital Computer Data Sports Watch JDM 1980s

Up for sale is a rare vintage Seiko RC-4000 men’s digital computer data watch, produced exclusively for the Japan Domestic Market (JDM) in the 1980s. This pioneering model is part of Seiko’s innovative RC (computer data) series and represents an early experiment in wearable computing technology, making it one of Seiko’s most unique and collectible digital watches. I believe the watch is fully working; however, I do not have the original instruction manual and the operation of this model is not straightforward or intuitive like a standard digital watch. All buttons appear to engage the module and successfully cycle through various modes, but because of the complexity of the watch and my unfamiliarity with its full operation, it is possible that certain functions, such as sound or other features I am not aware of, may not be operating correctly. The buyer should be fully aware of this uncertainty prior to purchase. All parts of the watch are original, including the Seiko-signed stainless steel bracelet and clasp. The watch shows signs of use and age consistent with a vintage piece but remains in good physical condition overall. Photos best describe its physical condition and should be reviewed carefully. Key Details • Brand: Seiko • Model: RC-4000 • Reference: S291-4010 • Era: 1980s • Market: Japan Domestic Market (JDM) • Movement: Digital • Condition: Believed to be fully working • Strap: Original Seiko-signed stainless steel bracelet • Originality: All parts original A highly collectible and historically significant Seiko digital computer watch, offering a rare opportunity to own an early example of Seiko’s experimentation with advanced digital technology. Ships carefully. Feel free to message me with any questions.