These observations are either mostly interpretations of wear, or insignificant in value.
1976 Bicentennial Quarter "no mint mark"
Obverse
Liberty seams off, runs real tight to the edge with differences in height.
"BERTY" not raised flush, has odd dip along with more details.
"In God we trust" seems crudely stamped with in all connected.
1776 - 1976 looks crudely stamped as well, all the numbers are different in size, shape, raised, etc
Reverse
Entire circumference of coin "above United States of America & quarter dollar" looks like a possible die c



