Not a partial collar and not an error, it looks like the ribs have been scored, possibly by some sort of slot machine? In any case, this would have happened after the dime left the RCM. So it is PMD.
That groove around the rim is very common. I don't think it is PMD or really an error. My thoughts are that it is poor quality control. I have some pictures that may or may not support my thinking. If you zoom in on the photo with 3 dimes you can see that it is not a scratch on the top coin.
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