per vertyg on gitaneusa site
hub threading sizes
French threads 34.7mm x 1mm (1.366" x 25.4 TPI)
English threads 34.8mm x 1.058 (1.370" x 24 TPI)
Italian threads 35mm x 24 TPI (1.378" x 1.058mm)
ISO threads 34.92mm x 1.058 (1.375" x 24 TPI
French lockring size
It looks like French thread lock rings are 33mm x 1.0mm (1.299" x 0.039"). I guess that they have Left Hand threads.
thanks chas