[bdfromlv]

97.5% zinc, 2.5% copper 82-2021, pre 82 95% copper

[Migraine]

Thanks for the info. If I ever knew that, I’d forgotten. And zinc is only worth 1/4 of copper: $4 vs $1 or thereabouts.

[KarlInOhio]

97.5% zinc, 2.5% copper 82-2021, pre 82 95% copper

They switched about the time I had high school chemistry. You could melt the zinc ones in a bunsen burner flame but not the copper ones. You could also get in trouble for randomly sticking things into the bunsen burner flame.