Strange Kennedy halves

[axiom_87]

Hey guys new to the forum.
I was coin roll hunting the other day and I found a few of these Kennedy halves with numbers stamped in between the T and the Y, I am wondering what these numbers are and if they are rare or sought after.
I also found a Kennedy Half that looks like it has the chicken pox.
check out the album.
thanks in advance.
Strange Kennedy's - Imgur

 

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[Jason in Enid]

Nothing more than post-mint damage on all of them. Nothing special or even worth more than face value.

 

[GrizLeeBear]

As stated, somebody added those numbers for their own edification. They will still spend.......

 

[axiom_87]

excellent, thank you for your help.

 

[woodstock]

Could have used as seeded coins in Detecting Club hunts and the number represents the prize . IMHO , Woodstock