Up for auction is a museum-tier piece for serious digital watch collectors: the Casio CGW-500 Cosmo Phase (Module 830) in the rare stainless steel case.


Unlike the more common resin models, this steel variant is highly sought after. Finding one in this level of preservation—complete with the original factory strap—is an increasingly rare opportunity. This watch features the legendary Module 830, capable of calculating planetary alignments and solar data across a 300-year window (1901–2200).


Condition Details:
LCD Display: Crisp, high-contrast display. No screen bleeding or fading. All segments are fully functional as seen in the attached gallery.
Crystal & Case: Excellent vintage condition. The stainless steel case retains its integrity, and the case back features clear, legible markings identifying the 830 module and serial number.
Hardware: Ships on the original factory strap, which maintains the authenticity collectors demand.


Functions:
300-Year Calendar with Planet Cycles
Daily Alarm & Hourly Time Signal
12/24hr Time Display
Stopwatch


This is a fully operational, investment-grade collector's piece that rarely hits the market in this configuration. Please review all provided high-resolution photos for exact cosmetic condition.


A few light scratches on the glass but expected for it's age, please look at all pictures for its condition. Unlike other listings this one comes with the original strap, I've owned this since new.


Thanks for looking! Will make sure to ship with the watch fully protected with care.