Easy one first... no mintmark means it was struck in Philadelphia (S = San Francisco, D = Devner). 
"Offset border"? Not quite certain as to what you mean? Alignment? (orientation on the coin?).
"Weird design in the back"? You haven't shown us the reverse (yet?)
to the CCF! We welcome all of your questions! 
"Offset border"? Not quite certain as to what you mean? Alignment? (orientation on the coin?).
"Weird design in the back"? You haven't shown us the reverse (yet?)























