1972 Kennedy Half - strike through or planchet flaw?

In the area around L of Liberty
Coin Photographer and Videographer
https://www.youtube.com/@FriendlyEagle7
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In the area around L of Liberty
Coin Photographer and Videographer
https://www.youtube.com/@FriendlyEagle7
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From what I can see in the photo it looks like a strike through grease or other material