rotation error

Looking through a pot of old coins that i found at the back of the drawer i found a 1987 10 franc coin with a 180 degree rotation. I'm assuming this is quite rare  and would appreciate any information or an approximate valuation please.  

 Pictures please - ideally in a mirror 

like that I made, so both sides can be seen together. 

Is it a French coin, as you did not say? 

Same denomination and year also for Madagascar and Western African States coins. 

 I guess you know that this coin (presumably) 

N#683 

Orientation: Coin alignment ↑↓ 

already is with the front side upside-down from the reverse. 

Yes it is a french coin, says millenaire capetien on the reverse with a man in a cloak?  Sorry i'm not a coin collector!

I will try and take a photo

N#693 

Orientation: Coin alignment ↑↓ 

yes that's the one i have.  Is it worth anything other than fv please.  If not i'll pop it in a charity box.