Newbie question. Is this an error?

Is this considered an error (connection between "S" and "T") and if yes what name is given to it? Found in bag of Denver buffalos.
Any comments appreciated.
http://home.comcast.net/~oregonnative/2005buff1.jpg

 

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Its a diecrack...I don't think it adds any value to the coin at all.

Speedy