I know this Lincoln is not a proof. It is a WAM, But please look at this one at the stairs. The whole vent itself. Thanks.
Yes,it's a WAM as it should be,steps look damaged but still a cent. https://www.lincolncentcollection.com/closeamwideam.php#:~:text=To summarize the following is,strikes have a Close AM
It appears that it could be a strike through. Can't tell a lot from the photos, but it doesn't look like damage to me.