Just a few questions....Could this have been a blank sandwiched between 2 others during the plating process? Is there copper plating all the way around the circumference of the edge? What is the weight?
IMO save until an expert could view this coin in hand (maybe a large coin show near you) No need to be in a hurry to spend it. Looks well struck (especially the reverse) and not seeing any effects from acid...I'm on the fence with this being a plating error.....

Edited:

to CCF....can we get a shot of the edge?.... also in future posts, Please crop out all unnecessary background, that will give us larger pixs to view
Edited by Greasy Fingers
02/05/2022 12:13 am