There are a handful of good 1970's folders that are worth knowing about
: Raleigh Twenty, Dawes Kingpin.... Everything else is based upon the U frame like the Bauer and tends to get lumped together as so many bikes used that design. Obviously there will be variation in quality between U frame folders but the H frame folders were much better than the best U frame. Have fun with it and if you get addicted to refurbing old folders, get a Twenty or even better a Kingpin (if you can find one)