Off Center In Two Directions About 90 Degrees Apart

I fully understand you're in it for collecting rather than profiting, PBP. Value and knowledge are inseparable though. Without the knowledge of value, you wouldn't know what to collect. Knowledge of what adds value, tells you how to collect. I'm afraid you're going to have to learn them simultaneously. lol Heck, you can't even tell someone "nice coin", unless you have some knowledge of it's value. That's why I told you what added value to a MAD.
I think you're wise to take those notes, there's a lot to learn here. You'll probably reference them often at first. Some things here don't come up very often, Those are the notes you'll keep the longest. The picture below is the best note I've taken. When you fully understand it, you'll have some truly valuable knowledge.

This looks like a case of a Rim Fin that has flattened a bit. Here is more information on this from Mike Diamond:
http://www.error-ref.com/?s=finning
The cause? He mention die tilt that left a small area near the collar to have a bit of space. The metal rises on that area:

Note the raised area on the rim on the nickel? That hasn't flattened down yet. So these are common to find the flattened ones. Probably the first time it get put into a roll or a counting machine, that fin will flatten. That looks like what happened to your coin. So no premium, more of a knowledge thing.

Thanks coop very informative ! Thanks conder101 I agree it is interesting to me to I have already put it in my collection as an example and thanks to you guys I know how to label it now .