What's up w reverse at 9 o'clock on this 1857 O half dime?

So as I'm looking thru some little coins that I can't see well w my eyes anymore, camera assist to even see dates etc. Just wondering what is up w the reverse of this 57 o half dime?

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So as I'm looking thru some little coins that I can't see well w my eyes anymore, camera assist to even see dates etc. Just wondering what is up w the reverse of this 57 o half dime?
Comments
not much I can see
30+ years coin shop experience (ret.) Coins, bullion, currency, scrap & interesting folks. Loved every minute!
Looks like a little rim damage
All comments reflect the opinion of the author, evn when irrefutably accurate.
Can't tell from that picture. Might be damage, might be a minor planchet lamination.
I'm in the damage camp from this photo.
My Collection of Old Holders
Never a slave to one plastic brand will I ever be.
There are no major rim cuds known for the 1857-O.
There are some minor ones, more like "rim fins".
I'm in the post-mint damage or minor lamination camp. It's hard to say from the photo. No extra value.
I looked at all of my 57-O half dimes, and don't see anything in that location. And as @yosclimber wrote, there are no known notable cuds for the 57-O. (My notes indicate one variety with a rim cud at a different part of the rim, but I don't have the coin or a photo, so that remains in doubt unless confirmed some day.)
Collector of Liberty Seated Half Dimes, including die pairs and die states
Yes, rim cuds are raised. The photo looked like there might be some small raised areas on the edge of the rim.
But I agree, the main thing at 9:00 looks like pushed in rim damage.
Could be a slight lamination. Looks like a layer separation.
Nice obv die cracks thru stars.
Jim
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Best pics I can do.
mini-lamination on the edge
30+ years coin shop experience (ret.) Coins, bullion, currency, scrap & interesting folks. Loved every minute!
Rim damage
Just keep taking different positions; you're bound to be right sooner or later!
I certainly am not the one to determine these 'things'
and particularly with photos. 
Meant to post earlier but I had to pull the photos from another device. Here is my half dime (draped) with an edge flaw for comparison. Not sure what was the planchet flaw that caused it. It has a notable depression on the obverse. A little tough to get an edge picture in the slab but the phone camera did maybe okay?


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Obverse edge
Reverse edge
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It appears to be a minor defective planchet (delamination).