at local flea bought one of these and couple of other ones. So, can enyone help?

These cassettes were produced from 1972-1973.

Then that's cool! Thanks allot, Dave. I found a funny self-made"radio broadcast" recorded on that cassette by a little girl:]. She plays there with kids sythesizer, sends greetings to her friends, all kids in the world, dedicates some music for her dad and mom, all is recorded with big attention and lot's of patience. Very funny material there, i wonder when it was recorded:].I remember, when i was a small kid i was doin same things with my mates, imitating some real radio broadcasts and stuff:]