That's the "Profil" version of the Concor saddle that's meant to be a more aero design than the original.
A product of the big "Aero" design movement of the 80's, it really did not catch on too well when it came out as everyone seems to have preferred the original concor design instead, and many, including me, found the undersaddle rib and cover extension a bit unusual looking. What's weird is, now people would pay much more for these (specially NOS) on the auction sites than the original Concor design withou the aero feature, so it seems to be getting it's revenge over the original design after over 20 years of playing the second fiddle to it.

Chombi