Doubling of Kisatchie Washington Quarter

I recently opened a roll of Kisatchie non-Proof S-Mint quarters that I purchased awhile back from the US Mint. On the obverse of a couple of the coins it appears the face of Washington below his nose (upper lip, mouth and chin) have a doubling effect. Does anyone have any information regarding this type of effect.
Thanks

 

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Without photos, it's probably the
common effect known as mechanical
or ejection doubling.

 

Photo of doubling effect on Kisatchie Washington Quarter

 

MD as stated above.

 

As Fred said and I have seen plenty of this from 100 coin bags.

 

Thanks all

 

I have over 40 Saratoga S minted Quarters with the same MD on the profile of Washington. Appears to be common.

 

Thanks Roseland....