I have a friend , owner of a Wauquiez Centurion (+/-) 1965.
He lost the winch-handles of the mast, and was in trouble. The model was the same models that the modern winch-handles , but the diameter of the "head, or tip" was a little shorter. Imposible to find a new one.
The solution was in Auclair Nautic - Manivelas de winch.
, winch-handles for all the old models of winches.Barient, Barbarossa,Lewmar,Gibb.
I think it could be great to have this information in the group" Wauquiez".
Have a good day and good winds for the season.