Yeah, they all get separated out into their own pile and I weight them with a scale after the whole box sort is done. I keep all these sorts in a notebook. Here are some more examples. (1982 Z/C) 9/63, 17/71, 14/67, 11/70, 16/52, 13/63, 14/68, 11/72, 12/65, 13/47, 9/50, 9/51, 11/61, 9/59, 9/50, 9/56, 16/62, 11/56, 17/73, 6/61, 6/65, 10/52, 15/64, 11/61, 11/52, 10/57, 9/74, 19/48, 11/56, 10/79, 9/64, 5/81, 8/53, 7/54, 9/51, 7/59.
They made the transition pretty late in the year, end of October it sounds like.
https://www.ngccoin.com/news/article/646/ It is staggering that of 181 pennies from 1982 that only 20 were zinc. So almost 90% are copper. I thought that perhaps 60-65% is more likely the long-term number that most people come up with. Just curious about your methodology. Are you weighing these on a scale and figuring that those which are 3.0-3.1 grams are copper (vs. 2.5-2.6 grams are zinc)? Or are you doing something else?[/quote]