can anyone tell me what this is

look at the L O and S thanks for your input

 

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Looks like Post-Mint Damage (PMD) and just general wear of the coin, causing the metal to flatten and spread outward.

 

Looks like another morgan dollar's rim bounced right off that area

 

Don't see anything on the S but the DOL have taken a hit (possibly with some lateral movement) that has caused a dent/scrape across them.