I've been researching copper cookware for some time now and stumbled upon this.
https://youtu.be/mTztlpAcips
Link to Duparquet - Duparquet Copper Cookware
Based on price and weight (thickness) of copper, he falls into the Mauviel M'150 series. Where as the Mauviel also has the M'250 series.
But would be interesting to add a piece of 'merica made copper to the collection.