Pre-ban Magazine Identification

Need some help identifying pre-ban magazines:

1) I'm assuming that the 30 round Adventure Line with black followers are pre-ban because they were produced in the 60s and 70s only. No internal or external dates. Is this correct?
2) I am assuming that 30 round Sanchez with black followers are pre-ban because they were made in 80s and "early" 90s. No internal or external dates. Is this correct?
3) What about 30 round Labelle's with black followers? They were made in 80s and "mid" 90s. No internal or external dates. Anyway of telling pre-ban or not on these?
4) Are any of these "safe" to purchase in those states with restrictions?

Thanks