Off Center In Two Directions About 90 Degrees Apart

Just found a 1972 rim missing both sides 180 degrees away . I hope the pics are oriented correct this time if not let me know which direction they are rotated .

thank you crazybo I'm trying to pick up all the information I can . And to add to this question if a coin is stamped on the obverse to where there is no rim on the right side of the coin on the obverse and the reverse is normal as in same size rim all the way around what is that called and what is the cause ?

And that is common as well?

Thank you fuzzy317 I appreciate the answer on the value but I was just asking for the value of the knowledge of being able to spot and identify things . I appreciate you and all of the folks that reply for sharing your knowledge with me !

While I have heard these sometimes referred to as slightly MAD, I think Your 72-D is not a MAD, it would have to be missing some of the rim completely. A MAD gains value when it's so misaligned, the devices start to fall off the edge.

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 .