Not much need to describe this item.  If you know anything about the modern halves, you know this is a key date and an extremely rare grade at this grade.  
 
There are no PCGS MS-70 specimens!
 
There are a  very few NGC MS-70 specimens.
 
I don't know how many ANACS specimens exist, but I have been watching and have seen almost no evidence of them on the market.

ANACS is the oldest independent grading service.

This is one you don't want to let get away.  I am reluctant to let it go but selling to reduce simplify estate