1945-S Walking Half stuck on wrong planchet?

Found this in a lot of 90% it weights 11.3 grams and measures 29.68mm. Would this be a light planchet or possible wrong planchet. As for strike its a bit weak but hard to tell with the wear, it was struck centered and reeding is full but not very deep.



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Perhaps a Philippine or other foreign issue blank was used.
It could be a contemporary counterfeit as well.
cool find and hopefully some experts will chime in on this one.
It could be a contemporary counterfeit as well.
Used our spectrometer on it, shoots as 91.68% silver.
Maybe it's the right one, but was defective?
'Tis a puzzlement.
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"1945-S Walking Liberty Half Struck On An El Salvador 25 Centavo Planchet NGC MS 63 This is the only known Walking Liberty Half Dollar struck on a Foreign Planchet for another country. It is on a planchet that was produced for the El Salvador Silver 25 Centavo. The 25 Centavo was struck for only two years, 1943 and 1944. Since this Walking Liberty Half Off-Metal is dated 1945, it is on a left-over planchet that was stuck in the bin or hopper from the previous year or the coin was minted in late 1944 as the Mint was gearing up for the next year’s production."
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fixed
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always found in change.... and a light one would be noticed immediately. Cheers, RickO
Wartime coinage was very prone to wrong planchet strikes if my faded memory serves me right.
It was also very prone to planchets rolled to the incorrect thickness, which I believe to be the case here. Even though the Mint was striking coins for several foreign countries at the time, I didn't see any that imediately jumped out at me as candidates for this coin.
Sean Reynolds
"Keep in mind that most of what passes as numismatic information is no more than tested opinion at best, and marketing blather at worst. However, I try to choose my words carefully, since I know that you guys are always watching." - Joe O'Connor
the thing that makes me guess that it is a foreign planchet is the reeding. The op described the reeding as significantly different from a regular US half dollar.
The reeding is imparted at the time the coin is struck, so if it was struck by US half dollar dies, I would also expect it was placed in a US half dollar collar. The OP states the reeding is weak, which is consistent with a thin planchet as a thin blank would not fully expand out to form the rim.
Sean Reynolds
"Keep in mind that most of what passes as numismatic information is no more than tested opinion at best, and marketing blather at worst. However, I try to choose my words carefully, since I know that you guys are always watching." - Joe O'Connor