Then you’re talking density on top of weight. You’ll need a special marked water tank for that. Last one I saw was in college. Then you’ll need a table that tells you the weight per square cm of both copper and tin. And then away you go. Specific Gravity here we come!Thank You Makinao.
I think I saw this a while back.
For vintage, I was wondering if unmarked cymbals would be traceable in their alloy composition based on weight.
Edit - had no idea I’d remembered all that. Been thirty-five years since that class.