Damn. I'm puzzling over this, too.
Adriaan: I really liked your thought about Series electronics not fitting the standard Europa shape. I'm not sure you are right though - According to the Quote Generator, you can build a Series II with either a Europa or Europa II body.
By my read, the QG mentions the EII as an available option for the Series 2, but not the Series 1; and available on the the Rogue, Europa and Essence, but none of the King and Clarke models.
Go figure. Any other theories or actual answers out there?
Bill