Need help identifying a Commodore power supply...

[nildem]

I received this in a box filled with primarily Atari stuff that I purchased at a garage sale. It doesn't appear to fit any of the Commodore systems I currently own.

6831 6832 6830

I was able to find this auction on eBay (http://www.ebay.com/itm/Commodore-PLUS-4-Plus-4-vintage-computer-POWER-SUPPLY-/250861322384), which looks to be identical to the item I have, and identifies it as a Commodore Plus/4 power supply, but the images in the Commodore Plus/4 entry on Wikipedia (http://en.wikipedia.org/wiki/Commodore_Plus/4) depict a system with a circular power jack (http://en.wikipedia.org/wiki/File:Plus4_Interface.jpg), and a significantly different power supply design (http://en.wikipedia.org/wiki/File:Plus4_komplett.jpg).

Any ideas?

[Gameguy]

It appears to be for the Commodore Plus/4. I'll post links with pictures.

http://www.obsoletecomputermuseum.org/plus4/
http://www.obsoletecomputermuseum.org/plus4/plus4_2.jpg

Several Commodore computers had different revisions with changes to the power connector made, I guess this is one of them. The Vic 20 is another one.

http://www.classiccmp.org/dunfield/vic20/index.htm?newwindow=true
http://www.classiccmp.org/dunfield/vic20/h/rside.jpg