It looks similar to an older Dahon Speed, from back when it needed an aftermarket rear derailleur hanger in order to use anything other than the stock "Neos" RD. It might still have something with identifying marks (handlebar clamp, etc).
Pssst! Fnhon Storm frameset is the same as the newest Dahon Speed (except that the fork is aluminum). Typically around $160 before shipping cost.