1792 2-Sols France Off Center Double Strick And Rotated

It is old verdigris, this is what the reverse looked like before an acetone soak and Verdi-care treatment. The obverse did not have any verdigris.

I collect coins of the Duchy of Lorraine (which became part of France in the mid-1700s), and earlier in the 18th century, it is common to find larger silver coins (testons)which are re-used ("reforme") and struck again several years later, often with only a date change. Rotation is common, as is some degree of off-center, but I have never seen one struck with this degree of off-center. Here is an example: https://www.ma-shops.com/saive/item.php?id=2542

These are not considered errors, since it was a standard mint practice, and varieties which have only been struck once ("flan neuf") command a premium, as mentioned by @NumisRob.

So, one way to answer your question is yes, this kind of thing is common on certain 18th century French silver coins, BUT if I look at the details on yours, I tend to think it is a true double strike, rather than a re-used planchet.