Does NOT include case or power supply. Works great on 2- AA batteries.  

For the perfect collector...See photos for condition.

Cleaning out my Father N Law's desk & office we found this Commodore 9D31 Calculator but couldn't find the case or power supply.


Not to much info out there on google talking about this but I did find this:
 Through the 700/800 series, Commodore continued to use red LED displays, but by 1975 fluorescent displays were becoming increasingly popular due to their lower cost. Commodore assimilated this trend, too, by creating an entire series based on it: the Green Line (GL) series. These popular models also looked like nothing Commodore had produced before: thicker than the 700/800 units, with an interesting profile vaguely similar to the Hewlett-Packard "Woodstock" or "20" series. A rarer variation of the GL line is the "9" series, such as the 9R31 or 9D31 (a "D" in Commodore vocabulary means "disposable batteries"); this series may have been produced for the European market. Unfortunately for collectors seeking mint examples, the GL calculators used a lot of painted-on silver trim which is almost always worn off to some extent.