What is this odd little box I've been storing for years?


I received this switch/pot a few years ago with a used preamp and have never been able to identify it. When I asked the seller he said he didn't know either, he just thought it was part of the preamp (it's not). I wish I could post a picture here - but it's about a 3.5"black cube, with an older brown AC cord, an on/off rocker switch, fuse holder and small attenuator pot on the front. I though it might be a wireless remote switch for a turntable, but can't find any similar images online. Any ventured guesses would greatly helpful
Glenn 
gwbeers
Post a pic and question to Vintage audio on facebook.  Someone will know what it is.  There are some very knowledgeable people on the site.
I do not know what it is, but I know you will not miss it if you throw it away as you obviously have no use for it anyway.
Glupson, wrong. The second he throws it out he will discover it’s an indispensable part of something. I can’t tell you how many times I’ve done that with various seemingly unmatched Tupperware. 
So wait, I'm having trouble. It has a power cord, and no other electrical connections to the outside world??