Traction Owner’s Club › Forums › Technical › Other › French Metric Threads › Reply To: French Metric Threads
More info …. but not much help, I fear.
https://www.oldclassiccar.co.uk/forum/phpbb/phpBB2/viewtopic.php?t=5681&sid=d60224d9ace0b3d198891b0016a7c4aa
B….