I pulled this from a box of 500 and am very curious about this coin. while, it may be a contemporary counterfeit, the fields look vaguely similar to an extremely tired and erroded die (both obverse and reverse).
Now, if it is a counterfeit, its not very well done.
More pictures can be viewed at: http://s164.photobucket.com/albums/u...sual%201977-D/
Edited to add weight: Weight = 11.3 grams