If you know then why did you ask for metal value - I was just answering your question.
Other members can answer the numismatic value; or look on eBay Sold listings.
As of today it seems there is no added Numismatic value above bullion value in general due to skyrocketing silver values. You did not provide a date so I provided what NGC estimates its value at for a slabbed and graded 1977 for instance at full retail. If you look at Numista's estimates for these coins, I have found swap values are GENERALLY between wholesale and retail values. As far as I am concerned it is valued at about $25 U.S. in any condition as of today. https://www.ngccoin.com/price-guide/world/france-50-francs-km-941.1-1974-1980-cuid-1128489-duid-1266258