Anybody knows Rega Model 2 Speakers?

I recently got a pair of pretty old Rega speakers. Their backpanel says they are "Model 2". They sound awesome. I love them. But the problem is that their model is obscure. I could'n find any reliable info so far. I asked Rega Research to identify their model, but, to my surprise, their comment was that these didn't seem to be Rega speakers. Damn it! Is there anybody who knows of these old speakers? Incidentally, they made in Canada. Thanks in advance