Atari Adapter

[odyeiop]

Doing some cleaning and I found this pretty hefty atari adapter. Just wondering if anybody knows what it's from.

The picture is pretty blurry, but the connector has 7 pins, the input is 120v and the output is +5V.

http://pixpipeline.com/s/18a1f0f5c9b.jpg

[Pantechnicon]

Since it has a 7-pin connector, my guess is it goes to some sort of Atari ST computer. Knowing the part number (printed on the label) would be helpful.

[odyeiop]

CO 61982

[Leo_A]

It's a 800xl power supply.