Agreed, please post a picture of the coin, (both sides), not of your hand. :)
Having said that, it seems to me that it's not the copper 5 centimes coin, which should mean that you have a silver coin in your hands. Assuming that you have normal sized hands, I would guess a 1/4 or 1/2 Franc. However, as the coin appears severely damaged (it has a hole in it: no French coins had holes in them in 1808), I personally wouldn't give more than bullion value for it.
If you can post more accurate pictures, I might tell you more.
Having said that, it seems to me that it's not the copper 5 centimes coin, which should mean that you have a silver coin in your hands. Assuming that you have normal sized hands, I would guess a 1/4 or 1/2 Franc. However, as the coin appears severely damaged (it has a hole in it: no French coins had holes in them in 1808), I personally wouldn't give more than bullion value for it.
If you can post more accurate pictures, I might tell you more.






















