Error People - Opinions on this Dime, please

A coworker showed this coin to me today. He found it in circulation. I can't tell if it is an error coin or not. It almost looks ground down, only there are no signs of abrasion like would happen if it was ground down. I asked him if he would let me post a picture so I could get the opinion of some of the error experts here on the board. What is going on with this one? An error? Post-mint damage? Thanks, in advance, for any opinions.

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Comments
San Diego, CA
I do not think it was a wheel , metel does not look right for that. and why use your time do all that work for pennys.
Dose it looked dip?
There be alot of rouge that would mud up the unit to clean it , so it was not cleaned by a ultrasonic unit.
25 inf 1/14 Gold Dragons ,never surrender, over come and adapt
and hold at all cost!
It does resemble somewhat the effect you get from a broadstrike on a type 1 planchet that hadn't gone through the upsetting process.
I have a 1944 merc that has this look.
Garrow
Sean Reynolds
"Keep in mind that most of what passes as numismatic information is no more than tested opinion at best, and marketing blather at worst. However, I try to choose my words carefully, since I know that you guys are always watching." - Joe O'Connor
Didn't wanna get me no trade
Never want to be like papa
Working for the boss every night and day
--"Happy", by the Rolling Stones (1972)
that even some of the higher points on the reverse still have mint luster while the entire cladding
layer is stripped away in spots. This can't happen naturally and implies a very hard instrument
or surface was employed against it.