Question on an NGC slab

I've seen NGC slabbed coins with a 'W', and also with a '*', but very recently saw one with both '* T' on it. I know 'W' is/was for 'white' (I believe they did away with the 'W'), and the '*' is for a 'premium ' coin (in NGC's eyes). Can anyone shed some general light on the 'T' designation, and more specifically, what a '* T' might indicate? Also, what is the likelihood of getting a 'green bean' on a '*' coin? Thanks in advance for your replies/help.
I'll come up with something.
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Authorized dealer for PCGS, PCGS Currency, NGC, NCS, PMG, CAC. Member of the PNG, ANA. Member dealer of CoinPlex and CCE/FACTS as "CH5"
The name is LEE!
<< <i>coinmanic, I have to agree with you totally about reselling. If I were ever to sell any of my non-PCGS coins, I'd make sure they had a 'green bean', or have them crossed to PCGS plastic. >>
Another koolaid drinker... A great coin will sell well no matter if it's PCGS or NGC...