Thanks for that tip--very helpful. I have an interested person who thinks in may be a 700 which was available for special order. I am wondering if there's any way of finding out from the company by giving them the serial number which is handwritten on the back of the speaker.
Another view of the Patrician IV. There are several scratches on the base of the unit. The front panel looks like it does come off, but we were afraid to pry it too hard.