Unfortunately I don't have the Catalogue Raisonnée of Lepoix's work. Was it a design for a Typ 3 (1500 / 1600) successor?
No. It's easier, though it's hard to see from the look of this car...
BTW: I've purchased the Lepoix book just a month ago for € 49,- wihich I felt was a good price. Now you get it on Amazon.de for € 25,- only..