Black 5-zip up on Oki-Ni.
I purchased this same 5 zip in January from Tres Bien in January. Very thick heavy calfskin, and the gunmetal zips are also very substantial. Lining is sort of scratchy cotton material, doesn't seem like it will hold up as long as the jacket but it's lining, I'm not that worried. I think I have pics up in RP from when I got it (should be in the gallery associated with my account). Overall, it's the jacket you'd expect it to be from Margiela.