Hello. The value of a coin like this would depend on the grade certification. The coin page has many recent past sales listed from US $24,000 for NGC graded PR66+ to $444 for NGC graded AU53. It's pointless to guess how much this coin would sell for without an official authentication and grading.
N#8003
Can you post pictures of the edge?
Edit: Never mind. I see you posted them in the French forum. Did you not like the answer you got there where the debate was about the grade? And since you posted the same question on the German and Spanish forums maybe you'll get an answer you like.
