Up for sale is an ultra rare and highly desirable Casio Cosmo Phase CGW-50 men’s digital astronomy sports watch, powered by Module 830 and produced for the Japan Domestic Market (JDM) in the 1980s. This model is one of Casio’s most collectible vintage digital pieces, featuring the iconic cosmic/astronomy phase display with functionality spanning the years 1901 through 2200.

The watch is in full working condition, with all features and functions operating properly. It is currently fitted with an aftermarket strap, as the original band has deteriorated over time. All other parts of the watch are original.

The watch has visible signs of use, but the photos best describe its physical condition and should be reviewed carefully by interested buyers.

Key Details:

• Brand: Casio

• Model: Cosmo Phase CGW-50

• Module: 830

• Era: 1980s

• Origin: Japan Domestic Market (JDM)

• Features: Astronomy/cosmic phase display (1901–2200), calendar, digital timekeeping, alarm, stopwatch, 100m water resistance

• Case Material: Resin with stainless steel back

• Strap: Aftermarket replacement strap

• Condition: Full working condition; visible signs of use — see photos

This is an ultra rare Casio collector’s piece, seldom seen in working condition and highly sought after for its distinctive Module 830 astronomy display. A must-have for serious vintage Casio collectors.

Ships carefully and securely.

Feel free to message me with any questions.