this is by no means a comprehensive list. generaly the high end french bikes built of reynolds tubing (even though there are quality french tubes) like the peugeot px -10 or motobecane le champion these would have unthreaded simplex dropouts. huret used to make a nut that allowed you to mount a nouvo record in a simplex dropout. a more elegant solution was to tap out the dropout, i used to work in wakefield, ma & there was a shop that did retail sales of metric taps & dies, you will still need to file a stop. this option is probably more viable when consider how much trouble you would have finding the huret nut. i do not have any details about this nut, in the 1970s one of friends in the club used to ride a px-10 with a nouvo record rear derailleur & i haven't seen guy minnick in 25 years.