Just for the record.
I brought this machine in July 1999 and I would have to assume that it was built before that.
The manual that I'm using has electrical schematics which were revised in July 2000. Judging by them the machine is either Series 10 or Series 11, if it really mattered I could check the schematics in the manual against the one in the console. It was just something that I was mildly curious about so I just asked, but I'm not going to spend any more time on it.
Same old, the motor control board is fried, I'm going to order the conversion kit.