Originally Posted by
noobinsf
Well, I took OP at his word that 9/16” was confirmed, but it’s worth investigating the French if it’s in question. Since French is smaller diameter than English, worst case scenario is that you end up with a functioning crank that is now converted to English, bit I know whether that constitutes an upgrade is contentious.
The pedals are confirmed. The crank is the one that consistently doesn't match different pedals.
Since the cranks are unmarked, I don't think converting them to a different factory threading damages their collectability.