That looks like an Andre Bertin frame from the 1960's.
Bertin used this style of swagged seat stay tops up into the 1980's.
The numbers stamped into the Nervex bottom bracket shell are the angles not a serial number.
The "serial numbers" stamped into most French bikes are untraceable and have no basis in reality! Use them for lucky Loto numbers!
The lugs look like an early short point version of these Prugnat Type 62D not Nervex.
The frame was probably made for Ron Kitching for sale in the UK. It a has British thread bottom bracket.
Andre Bertin and Ron Kitching shared the Milremo brand name for components and accessories. Ron Kitching also sold Bertin frames.
Bertins for sale elsewhere would have had French threads.
The dropouts look like old forged Simplex style.
verktyg
Chas.