1993 is supposed to be close AM. It is good to know that you know what is wide AM and close AM. You want to look for the wide AM for the early 1990's I think.
You're looking for 1992 close AM, as not that many were struck before the sea change in 1993, when all pennies should have it.
Here! Read this and then drink some prune juice. http://www.lincolncentresource.com/wideams.html Chris
It may be closed, BUT only the 1992 closed AM, 1992D closed AM, 1998S closed AM, and 1999S closed AM are worth something
I believe for 1993 you want to look for the wide AM, as that year is supposed to have a close AM as the others have already stated.
Castor oil. Castrol is an automotive lubricant (motor oil). I really doubt you took any of that, and if you had that would have had a very bad outcome, because it is an engine oil. Though, evidently Castrol is named that because it contains castor oil and that made the difference in viscosity.