1849 French 20 Francs

This should be a gold 20 Francs coin from France, minted in Paris (mint mark A on reverse) on 1,302,970 pieces. It should weigh 6.45 grams and has a gold content of 90%, leading to 5,805 grams of pure gold, worth 203 euro (at 35 euro/gram). It should have a lettered edge that is spelling "DIEU PROTEGE LA FRANCE" (The gods protect France).
It was engraved by the engraving department of the French Mint in Paris, but was based on an original og Augustin Dupré. At the left of the A you find a pointing finger on a hand pointing to the right, mint master sign for Charles-Louis Dierickx, who was mint master at Paris from June 15 1845 until Octobre 13 1860. At the right of the A you find a head of a dog pointing to right. This is the engravers sign of Jacques-Jean Barré who was head engraver at Paris from January 1 1843 until Feburary 14 1855.
Looking to the condition of this coin and knowing the volume, I will expect that the value is only the melting value of the gold. Also the 2 leading French coin catalogs (Gadoury and LeFranc) only give the melting value in this condition

Dirty with original looking patina. Even with the wear and marks I like it. But then I like orignal looking circulated coins. Don't ever clean it. When it comes time to sell it many collectors like this look.