1943-S WLH surface anomalies

Hi all, Like to confirm that this is an improper alloy mix. Peace Roy
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I have no idea what that is, doesn't look like a bad alloy mix.
"When they can't find anything wrong with you, they create it!"
Looks like something liquid spilled on the coin, leaving a residue and/or reacting with the metal.
I have two coins like that and I agree that it is an improper alloy mix but I am confused because I figured it would be a homogeneous mixture and not separated. Maybe @FredWeinberg can chime in?

Young Numismatist • My Toned Coins
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Although I can’t open any of the photos in the original post, based on the photo above, it’s not an improper metal mixture or error point of any type in my opinion – some type of liquid, as others have said, or aLightly corrosive liquid of some type – I’ve seen this effect on other coins – they didn’t leave the mint looking like that
Soak in 100% Acetone - see what happens!
"When they can't find anything wrong with you, they create it!"
I hope you mean the coin................

Mike
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Hope this helps.
Jim
When a man who is honestly mistaken hears the truth, he will either quit being mistaken or cease to be honest....Abraham Lincoln
Patriotism is supporting your country all the time, and your government when it deserves it.....Mark Twain
Looks like liquid of some sort to me. If it was an improper alloy mix... would likely see some the effect on the raised areas of the design that the effect surrounds. (and also the planchet - rim areas)
Thanks for your input. I soaked the wlh in acetone overnight, nothing changed. It's definitely in the metal. The obv seam at L I is particularly telling. I'm wondering if this isn't the prequel to delamination.
BST: endeavor1967, synchr, kliao, Outhaul, Donttellthewife, U1Chicago, ajaan, mCarney1173, SurfinHi, MWallace, Sandman70gt, mustanggt, Pittstate03, Lazybones, Walkerguy21D, coinandcurrency242 , thebigeng, Collectorcoins, JimTyler, USMarine6, Elkevvo, Coll3ctor, Yorkshireman, CUKevin, ranshdow, CoinHunter4, bennybravo, Centsearcher, braddick, Windycity, ZoidMeister, mirabela, JJM, RichURich, Bullsitter, jmski52, LukeMarshall, coinsarefun, MichaelDixon, NickPatton, ProfLiz, Twobitcollector,Jesbroken oih82w8, DCW
Thanks for opening up the pics for me
BST: endeavor1967, synchr, kliao, Outhaul, Donttellthewife, U1Chicago, ajaan, mCarney1173, SurfinHi, MWallace, Sandman70gt, mustanggt, Pittstate03, Lazybones, Walkerguy21D, coinandcurrency242 , thebigeng, Collectorcoins, JimTyler, USMarine6, Elkevvo, Coll3ctor, Yorkshireman, CUKevin, ranshdow, CoinHunter4, bennybravo, Centsearcher, braddick, Windycity, ZoidMeister, mirabela, JJM, RichURich, Bullsitter, jmski52, LukeMarshall, coinsarefun, MichaelDixon, NickPatton, ProfLiz, Twobitcollector,Jesbroken oih82w8, DCW
Here are some supposed improper alloy mixture coins from Google.
Jim
When a man who is honestly mistaken hears the truth, he will either quit being mistaken or cease to be honest....Abraham Lincoln
Patriotism is supporting your country all the time, and your government when it deserves it.....Mark Twain
wlh, definitely a chemical
acetone isn't a cure-all, or we'd dip toners in acetone