**UPDATED pictures. You can see the bottom of the 6 and the 7 clearly. The grime may be holding anything else out of view. I took a picture of a possible pup as well. Thanks for the help everyone
Noted to say you can see both the extra 6 and 7. Although the grime from whomever cleaned this coin has hidden from anything else of view
Unfortunately, I'm away from my reference books, but I'm sure somebody will be able to check.
You could try some acetone to see if the gunk comes off. A short soak shouldn't hurt. Maybe you'll get lucky and some of it can be removed
Check red highlights for diagnostics, if the CoinFacts image is correct, seems to be
That is similar but I do not believe it is the correct one. I think I have found it but I will provide better pictures in a couple hours to give you guys a better idea. There are denticals coming out south of the 6 and I do not see it on that reference. But I still may be wrong. I will check on the points when I get home. Thank you for trying to figure this out!
The d/c on the "S" is different too. The repunching on the 7 seems to be the same, but hard to tell in the OP's pic.