I ordered this from shopgoodwill.com, as "untested." What attracted me to it was the fact that the case hadn't yellowed in relation to the clasp unlike so many of these units that show up on eBay. And that S2 styling! For a couple dollars more than the price of a fast-food lunch I figured it was worth the risk, and if it didn't work I could put the hours I've spent watching YouTube videos on how to service these things to use. Turns out I didn't need to. It works perfectly.

So of course I had to pop the top panel off the base and peek inside!