This Offering is for an Original Atari Computer Power Supply.  Model No. CO 70042-01.  The unit says for use with the Atari Computer. 
The power supply is working and in good condition.  The voltage output is 9 VDC.   I have other units I will be listing over the coming days and weeks.
As always, send me any corrections or additions that may be useful.  I will send additional photos to serious inquiries.  I will post any suggestions that may be appropriate.