Is this a experiment coin that someone chemically altered to give it the gold color? Weight is 3.09 grams.
I was pretty sure of it. First one I found like it so thought I would share it and I will add it to my oddities collection. Much appreciated.
Numerous teachers used coins to demonstrate chemistry to students, so it could be one of those. https://edu.rsc.org/experiments/turning-copper-coins-into-silver-and-gold/839.article