My 50ml bottle of Vetiver has this on the bottom in raised letters:
MADE IN FRANCE
Partially written over BOTTLE in black characters are the numbers 683.
I also checked my 100ml bottles:
Duel: nothing on bottom of bottle except for small stamps (this is the frosted brown colored bottle)
Sables: same as for Duel but stamps better defined, also has 1247066 in black characters
Eau d'Hadrien: same as for Sables except number is 1132105
No logos or other writing on the bottoms of any of my 100ml bottles. But as far as I can tell, all of my bottles are legitmate.