Originally Posted by
hairnet
Why do you say stamped? They look like any other forged dropouts brazed into the stays. I can even make out the threaded holes for adjuster screws, usually seen on good quality bikes.
Good eye, didn't see the adjuster screw threads at first. So, if they're forged dropouts without a derailleur hanger, then the frame is either a unique 1970's fillet brazed steel frame, or something more modern with a pretty ambiguous intended function (I'm still thinking coaster brake or other internal gear hub).