I found these babies at my local trift store
I have never seen this kind of tapes
The sm20 is from 1989, and the D180 is from 1982!  Are they any good? What is puzzling me is the 180min. tape! I mean seriously 180 minutes of music packed in that case!. I wonder how thin and longlasting is the tape itself! And what about the sm20? R they one song special kind of tape?  Im seriously confused!!! Any comment or info will b appreciated!!!! Thank you to you all!!!!