Just a side note if someone else is dabbling with this kind of thing, I'll pass this warning on.
There are several interesting older touring style cranks from Stronglight with many crank lengths out there, but another
whole minefield opens up if you want to use them for a Retro-mod build:
a) sometimes they are JIS, sometimes ISO tapers sometimes, I don't think they even know themselves.
b) really obscure BCDs sadly obsolete so chances of finding modern ramped / pinned 10 or 11 speed rings is virtually impossible.
c) sometimes standard pedal threads, sometimes obsolete French pedal threads, at least this is clearly stamped on them.
d) and, it appears there are variations in the extractor thread dimensions......
The more recent Stronglight cranks in retro aesthetics are known to be produced by Sugino.