Yes I will get a scale. I did the popsicle stick scale several times. I think it is sink also. All comments are much appreciated. I learn from them. Also reading other posts help a lot. Looking closer I see what you Are seeing.
I did a drop test with a known copper and then the 1982 d. I dropped them on wood and on tile. I dropped them on the face and then on the edge. Maybe there was a slight difference possibly less resonance. I couldn't tell a lot of difference. I am thinking it is zinc. I probably get a scale. I may need it again later.