Thanks Graham! Well...I do now see the tiny black demarcations (old eyes). I do not see the clear plastic thing. Is this a piece that could have fallen off, or broken off? This turntable is new to me, so I don't know it's true history. I got it on E-bay, and the seller isn't responding to any further questions.
If indeed the clear plastic thing is missing, do you know if I can get one still, and is it easy to replace?
Guy