I got 4 of these off a guy about 2 weeks ago, and know nothing about them. Similar in shape to a CD 154. Anyone know the CD # for sure? He only wanted $3 each so i figured i couldn't go to wrong on the price. Front is embossed: [number] / E.S.A. and the reverse is embossed: T.1. I'm thinking Spanish??....Thanks for any help.

[IFONA CD 154.3]