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Great to read you have matters now well sorted.
Sounds like machine produced in 1969 as a 1970 model year product.
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Fittings -
pedals - Lyotard model Nr. 36
cranks - DURAX
chainwheels - Cyclo
bottom bracket fittings - REWAX MD
hubs - Normandy Sport hollow axle 36 hole w/M.M. Atom quick release
rear mech - Juy (Simplex) model 637
shift levers - Juy (Simplex) "3rd type"
VeloBase.com - Component: Simplex Prestige (3rd type, stem mount)
(cycle's earliest component)
headset - REWAX
gear block - Atom
drive chain - SEDIS
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Frame -
lug pattern - BOCAMA Nr. 68-I
crown - Vagner Nr. PL with NERVEX cap Ref. 2590
shell - Gargatte
ends - likely NERVEX but not shown well enough to confirm
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non-original bits -
saddle
mudguards
front mech
handlebar wrap
tyres
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Safety tip -
stem is mounted too high
there needs to be at least ~60mm inserted into steerer for safety
please lower before riding
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