Improper Alloy Mix On Kennedy Half.. Need Confirmation

Just a normal half dollar with PMD. Its not an error sorry.

I was afraid that was going to be the answer and wish I could get better pics of what I am seeing.. I have had it under my stereoscope at 45x and there are absolutely no signs of a dip and the different tones of what I think is copper of various tones all seem to run together and there are no areas where it looks like buildup on the coin. That of course doesn't rule out that someone didn't put something harmful on it or dip it.. I can only tell you that the devices and the coin in general have no porous surfaces or from what I can tell anyway at a high level of magnification.. Yes it does have a few areas that are dirty and it has not had an acetone bath yet but won't bother if its PMD.. I just wanted to give a further explanation of what I see due to not being able to photograph it correctly..Thank you for your replies john1, coins and buddy. Guess I will just put it aside for now and it can join the others in the "don't have a clue...yet!" box.

Here are some pics of the edges of the coins.. In the first two pics you will notice the coin on readers right is the typical Kennedy half with the very slight rim of cupro nickel all the way around the coin... On my coin which is on the readers left it is mostly copper ( I would say 96% all the way around rim ) with small faint patches of cupro-nickel in a few different spots around the rim which you really have to look for and as shown on 2nd pic. That is about the biggest examples of one of these small areas of cupro-nickel on the edging .. I have tried to get the best pics I could for now and if we need better I will see what I can do but might take a bit.

Also I should note that the coin weighs 11.21 grams vs the typical weight being 11.34 grams for issues 1971-date. Here are some images for you.

Well I guess that's that ..The weight issue does make perfect sense though. I am just having a hard time understanding the dipped prognosis but I am what I would say still very very new to errors/varieties/how to determine PMD and counterfits so I have a long way to go and always value all your opinions. Sometimes you run into those coins that no matter how many times you hear or see PMD your mind just doesn't wanna accept it thanks coop... I was waiting for you to respond as john 1 had already said PMD as well but I wanted a few opinions on it.. Coop.. if its not too much trouble could you throw me a PM when you have time and explain how the acidic dip removed enough of the metal to reveal underlaying copper or maybe just change the colors or tones of the coin that drastically without showing any signs of porous traces on the coin.. I just wanna understand how this could be done.. I do understand how a dipped coin can be undetected if done absolutely correctly which most people do not understand enough or not enough experience to accomplish it. I'm just kinda baffled here and wanna learn.. Thanks in advance for your time.

Thank you coop for the pictures and the explanations. I think I have a better understanding on how this might have been done or happened. I appreciate you taking the time to reply and will most likely be asking quite a bit more questions in other areas in the future.. I'm kinda on/off in the summer as family time and motorcycle come first when the weather is nice but I usually am online later on reading and will be much more active on here in a month or so. Just trying to research and teach myself so when I do start looking for things I am currently struggling with I am able to find them easier.. I have a crap ton of coins to search from my personal collection and I crh as well but mostly just for silver at the moment but I do find a fair share of other things as well. anyway thanks and I'm sure we will talk again.