Simplex Selematic 5 rear derailleur: opening up cleaning overhaul

Simplex Selematic 5 rear derailleur. Crazy design and weighing in at 525g. From What I’ve read, it was realised in 1981 and ceased possibly by the mid 80’s. This is the 6 speed later model. Patented by it’s inventer Pierre Bonnard. Licensed under ANVAR, made by Simplex.

[@MrJob91]

I mis your videos @ atboy. They were amazing

[@rainerunsinn4808]

Now that's a rare piece. Nice job!

[@rysiekwesolowski3522]

I'd love to see it work on a bike...interesting design!

[@jeremynorth]

An interesting piece. Heavy but very innovative. It must have been the first indexed gears of its type, Bravo and excellent pronunciation of the French by the way.

[@vaynomblenner]

Looks like the indexing is in the derailleur, with the pawls interacting with that right angle plate that goes perpendicular from the pulley cage. If you try a totally friction shifter, I bet it'll still be indexed.
Also, looks like that smaller spring may act as a two way clutch like the one in a Huret Ratchet shifter.
Thanks for posting, happy holidays!

[@nguyenanh-ki9sr]

❤❤❤❤

[@maciejzielinski4033]

What a hunk of junk i love it