Rare Vintage Casio Cosmo Phase DW-3400 Men’s Digital Astronomy Sports Watch JDM

Up for sale is an ultra rare and highly desirable vintage Casio Cosmo Phase DW-3400 men’s digital astronomy sports watch, powered by Module 830 and produced for the Japan Domestic Market (JDM) during the 1980s. This is one of the most rare configurations of the highly collectible Cosmo Phase series, featuring a more robust and durable case design along with the distinctive golden “Cosmo Phase” bezel signature that sets it apart from the standard variants. The watch is in full working condition, and all features and functions are operating properly. The iconic astronomy/cosmic phase display functions as intended, covering the years 1901 through 2200. All parts of the watch are original aside from the strap, which has been replaced with an aftermarket genuine Casio strap as shown in the photos. The watch is in good physical condition but has visible signs of use and age. The photos best describe its physical condition and should be reviewed carefully by interested buyers. The watch comes complete with its original Casio presentation box. Key Details: • Brand: Casio • Model: Cosmo Phase DW-3400 • Module: 830 • Era: 1980s • Market: Japan Domestic Market (JDM) • Features: Astronomy/cosmic phase display (1901–2200), calendar, digital timekeeping, alarm, stopwatch • Case Material: Stainless steel • Strap: Aftermarket genuine Casio strap • Includes: Original Casio presentation box • Condition: Full working condition with visible signs of use and age An exceptional and highly collectible Casio digital model, recognized for its legendary Module 830 astronomy display, rugged case construction, and one of the rarest Cosmo Phase configurations ever produced. Ships carefully. Feel free to message me with any questions.