Hoping anyone can help me out here with this, as I have no idea what this is. 1964 US Copper Nickel? Pictures uploaded below. Any help would be great. Thanks, Craig
A nickel contains .250% nickel and .750% copper. When it tones as yours has it just leaves it a yellow or copperish color. Looking more closely at your photos it looks like your coin has suffered damage from something like an acid bath. It’s only worth five cents. Welcome to CT.