It's a Japanese made machine with a feed dog control and a quick release presser foot tension. The stitch length control and overall shape of the machine is very similar to my MW 7 Jewel. And it's not the "typical" HA1 clone.
Other than that, I don't know. There may be a J-A (?) number stamped somewhere on the under side. That is a code to the Japanese factory. Not all machines have that marking and some of the markings don't have a corresponding manufacturer. That chart can be found at the Yahoo Japanese site.
Sorry I'm not much help here.
Joe