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Anyone ever have any experience, info, or even heard of a "Say Electronics SPS 20 Regulated Power Supply"?

It is from my grandfathers collection and I would #1 like to see if it's operational and #2 get an idea of the value of it.

Found 2 on eBay that are in horrible shape 2 Say Electronics SPS20 Regulated Power Supply | eBay

Mine is in mint condition and has a polished steel case...

Here is a link to some pictures... Sorry couldn't figure out how to post picture directly on the post. http://detroit.craigslist.org/wyn/ele/5363769783.html?lang=en&cc=us

Thanks in advance