1877-CC Seated Dime - Type 1 & 2

I was looking through an advertisement which indicated a Type 1 and Type 2 for the 1877-CC dime.
This is the first I've heard and seen of this dime. Does anyone know the difference between the two? I can't imagine it being that big, or easy to detect.
I have such a dime graded NGC MS-63 so that sparked my curiosity.
This is the first I've heard and seen of this dime. Does anyone know the difference between the two? I can't imagine it being that big, or easy to detect.
I have such a dime graded NGC MS-63 so that sparked my curiosity.
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That's just a WAG. I'm clueless.
I have the Breen Encyclopedia, but it's at home and I'm at work.
roadrunner