1984 D penny! Why does it weigh 2.7 grams.

Timbobb

Is this an experiment or thick rolled or thin rolled??

Oldhoopster

The tolerance is +/- .10 gms for copper plated zinc, so up to 2.60 is normal. Since your scale only weighs to 0.1 gm, your coin could be as low as 2.65 and still show 2.7 (assuming it's calibrated). So maybe it's slightly heavier, but that's not enough to add any value. Not an experiment, just process variation on a high volume production line

Timbobb

@Oldhoopster said:
The tolerance is +/- .10 gms for copper plated zinc, so up to 2.60 is normal. Since your scale only weighs to 0.1 gm, your coin could be as low as 2.65 and still show 2.7 (assuming it's calibrated). So maybe it's slightly heavier, but that's not enough to add any value. Not an experiment, just process variation on a high volume production line

Thanks for the feedback.