I have an 1919 uk penny made of 95% copper. This is the only example known. See pcgs verification #39837766. I'm seeking $2 million us dollars.

How did you determine it's cupra-nickle?

https://dailymail.co.uk/news/article-2408762/One-penny-wrong-metal-1919-sell-600-000-times-face-value.html

Be aware though you would have to have your penny verified as such.