The braze-on front derailleur mount on you bike was peculiar to Simplex in the early 80's. I think that Huret also made some FDs to fit that style of mount.
They were never popular and never went mainstream. Peugeot and Gitane were probably the only bike makers that used that style and only from about 1982-84.
If you want to "keep it clean" you're stuck with a Simplex FD....
Is it wrong, or just French?
verktyg