1980 Quarter, 1971 D Kennedy Half, 1977 Kennedy Half

Murillo68

Hello Everyone,
It's been a long time since I have been on this site, and hope I'm doing this right. I'm wondering if someone could tell me about an 1980 Quarter I found which the edges look silver and the weight is 5.70 grams. I'm trying to understand how the weight works. My question is.. Is this coin considered 40% silver? I just don't get it, I also have a 1971 D Kennedy Half which weighs 11.45 grams is this considered 40% silver as well? Also the 1977 Kennedy Half which is dark brown and weighs 9.0 grams is this Clad?

Thank you

IkesT

@Murillo68 said:
My question is.. Is this coin considered 40% silver?

No. The weight is normal for a copper-nickel clad quarter, so If the edges look silver, the coin was silver-plated post Mint.

I also have a 1971 D Kennedy Half which weighs 11.45 grams is this considered 40% silver as well?

Not likely. You probably have a normal copper-nickel clad half dollar struck on slightly rolled thick stock, or just a poorly calibrated scale.

Also the 1977 Kennedy Half which is dark brown and weighs 9.0 grams is this Clad?

Yes. The missing clad layers and the reduction in weight could be the result of a Mint error, but more likely, the coin was acid-treated post Mint.