Here are a few pics and descriptions of three different vintages of Color Computers.

This is a Color Computer system (aka CoCo1). This would be a typical system from about 1982. Pictured are a 32K Extended Basic machine, a CTR-80A Computer Cassette recorder, Line Printer VII, a  GT-116 X-Pad Graphics Tablet , the original Color Basic manual and an early aluminum stick "black" joystick.
 

Here is a Color Computer 2 system, approximate vintage 1983-84. Pictured is the earlier version CoCo2 with "melted" keys, a 26-3024 Multi-pak interface, and a pair of Full height Mini-disks driven by a 26-3029 controller, an early Radio Shack Speech Sound pak, a more modern CCR-81 cassette recorder, and the original Color Mouse!
 

And finally the latest version, Color Computer 3. First seen in late 1986. Pictured is a 512K CoCo3, 26-3124 Multi-pak, Tandy Deluxe joystick, RS-232 Pak connected to an ATI 9600 KB modem, later style Tandy mouse and Speech Sound pak, CM-8 RGB monitor and a FD-502 disk drive.