Penny 1947 have interesting 7. End of number looks different then other 7. Maybe I'm wrong, but looks like shadow under 7, shape looks like number 1
PMD. Copper is a soft metal and you can see where the base of the 7 was pushed to the left. Sorry, not an error
Damage as mentioned above due to circulation. The area in red may look like a one , but it would have been way too long. Jim