If it was metaldetecting find then it would have it show to be closer to 5.7 or 5.6 5.5 5.4 even 5.3 on the scale not a whole 5.0 the weight of a nickel if it had that much rot or decay it would be chipping off in my hand and show the blue color some where copper gets when tarnished
Okay if it's so damaged then what exsplains the big S on the face of it don't ask me were the s would come from but it's there or the neck got a hour glass shape did you seem to see that ? By chance ?
I am going to ask you where the big S came from, because all errors and varieties can be explained as coming from the mint process. Just because you can't explain an anomaly, doesn't make it an error. A clad coin has 2 outer cupronickel layers bonded to a copper core. The cupronickel layers are an alloy of 75%Cu and 25%Ni. Under many environmental conditions, the copper in the alloy can segregate and/or discolor. This is particularly common on coins that have spent time in the soil. Also, If your coin was missing both clad layers, it would weigh a lot less than 5.1 gms. Missing 2/3 of the layers doesn't equate to the 10% weight loss on your coin. That right there should tell you, it isn't missing any clad layers. If you're only looking for confirmation, you're not going to get it, because the coin isn't an error. If you still think you have something, and the experienced numismatists and error collectors don't know anything, you can send it in to be authenticated. Without authentication, you'll get the same response from every other collector and dealer - it's damaged. Or you can save yourself approx $60 and hang around here and learn from a number of experienced collectors. Choice is yours.
If it was missing a clad layer, you wouldn't see the silvery surfaces on either side. Have you considered the possibility that the batteries powering your scale are getting old and therefore giving you inaccurate readings? You've been a member here almost 2 years, and it doesn't appear that you've learned too much about the minting process or error coins. Junk coins like yours appear in threads almost every week.
It lost weight due to the acidic environment it was in, hence the environmental damage. Read oldhoopster's post carefully, he covered it well.
There are big pits on the obverse of the coin. The metal that used to be where those pits are got corroded away. What's left of the coin naturally weighs less -- part of it has been dissolved away.
I honestly didn't even bother to click on the photos, so don't have a clue about it, but take my fellow members posts as solid opinions. Any time you have to post EIGHT additional post to force your point, you've lost the battle. In the future, please follow the below suggestions. For the best results, you should post "in focus," FULL IMAGE photos (after you upload your photo, two buttons appear: Thumbnail and Full Image, click Full Image and your photo appears full size on your post and are easily enlarged by clicking on it). Photograph coins on neutral backgrounds like black, grey, or white. Crop out superfluous background so just the coin shows (you can use https://www.remove.bg for free), and post photos with correct orientation so members don't have to turn their computer in some awkward fashion to view it properly. While it isn’t always necessary, it is nice to show both the obverse and reverse, even if your question is just about one side. Members can often give more valuable information having both sides to evaluate. Add close ups of areas you have questions about and make your questions as definitive as possible so we know what you are asking for. And try to have the best lighting possible to show the most favorable photo of the coin. Hope this helps in the future. Good luck.