They don't recall cribs that old.
How To Find Out If My Crib Was Recalled?
Has my crib been recalled
Trial and error. Get your self some babies and set up some experimental and control babies, pile them into the crib, and closely monitor whether any of the babies are seriously effected, and ask yourself: As a consumer, am I prepared to accept this sort of mortality rate? If no, it might indicate that your crib is a a crib that should be recalled. If you are an eager beaver, you could probably call up the crib companies quality control and offer them your hypothesis, perhaps they'll add your name to the final report.