1983 P 1c Partial Collar?

huh, that one is above my pay grade.. I'll sit and wait to see what our esteemed and learned colleagues have to say about this one

Looks like a slightly misaligned and slightly tilted die.

A partial collar shows up on the outside edge of the coin. So for us to see if it is, then edge shots would show this:

If the outside edge is normal it is not a partial collar.

Viewing the edge under a loupe, I see nothing unusual.

I'll label it a Rim Fin.

Thanks for the replies.

Cant be a Rim Fin. I see the same effect on the reverse at the same location. I highly doubt that a fin can form in on both sides at once. A very small off center coin?

Not an off center strike because the reverse looks well centered. When only one side is off center it's a misaligned die.

The secondary rim feature that goes around the top of 1/2 of the obverse is a classic sign of a tilted die.

Since a tilted die can exert extra pressure to one spot on the coin rim fins sometimes form. Notice that the fin is in almost the exact center of the obverse rim feature?

My vote is for a misaligned die and a tilted die with a resulting folded over slight Rim Fin.