Looking at the info in John1's link (tolerance of +- .19 gram), the 1996d seems to be within tolerances and the '70d just barely within tolerance once you factor wear into it.
Words of encouragement are one of the major food groups. We need to consume them regularly to thrive and grow.
Date: 1947 to 1964 Weight: 6.250 grams Tolerance: 0.194 grams Diameter: 24.26 (mm) Composition: 900 Ag, 100 Cu
US Quarter dollars (clad)
Date: 1965 to date (excluding Bicentennial 40% silver clad) Weight: 5.670 grams Tolerance: 0.227 grams Diameter: 24.26 (mm) Composition: 75 Cu, 25 Ni on pure Cu
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