1884 O Morgan Need Help Identifying Anomaly

That's a clash mark, the transfer of the Phyrgian Cap to the reverse die. The series is full of this feature and it becomes list-able when there is letter transfer. See the attached link and welcome to VAMming..http://www.vamworld.com/Attribution+101#DC

Thank you for the information and the link. Is it common to have the same clash in the same spot two years apart?

It may help to understand what a clash is, and forgive me if you already know this.
A clash happens when the hammer die hits the anvil die with no coin in between. With no coin to accept the strike, the dies "clash" and portions of the design from each die can be imparted onto the opposite die. The "lower parts", usually the fields, are the most protruding parts of the die and therefore get the most damage. Therefore it makes perfect sense that a clash will be similar to another clash of the same series regardless of year. There can be variance, but it would be more common to have similar clashes.

Looks like you get it!

Thank you Coinfrog! I'm trying

BTY, Napa fires are @ 77% contained! However, we had a casualty yesterday when one of the water trucks that supply water for the large fire trucks hit a guardrail and rolled down a steep embankment killing the driver. My heart and prayers go out to his family!

I just checked out that link dave700x, it certainly does look like it.