The indent on the upper part of the knee maybe just coin contact. If you could make a side by side with another coin the same year, it might help to tell if it is enlarged or not. Most of the time the DDR's are near the columns #6 & #7.
Here is your full side by side (picture on right is directly from PCGS Coin Facts, I didn't photograph this picture nor do I own this picture, all credit to PCGS)
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