1950-D Half Dollar Cud?

I have this Franklin half dollar (that's been cleaned ) that has what looks to be a cud on the obverse at about 10 o'clock. I thought it was PMD at first, but there's no damage on the rim on the reverse. I find it interesting that it's only on the rim and does not go into fields. What do you think?

 

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Small "Rim Cud". Rim Cuds : Cuds on Coins (cuds-on-coins.com)

 

I had a hard time finding that one. I was looking for a cud but that’s a rim cud and it’s a nice one.

 

I guess yes. I see a crack

 

I see a crack on the bell

 

Is it possible this is a fin that folded over and has worn from circulation?