I have what appears to be a PM-1. On the front is silk-screened "Model PM 1", and on the bottom inside it is stamped "Powermite 1". However, on the back it is stamped "PM2". I guess my confusion is in the Ten Tec ads I have seen seem to indicate a PM-1 did not come with a case, but a PM-2 did. Any of you collectors know if an early PM-2 was really just a PM-1 with a case?