No, that is boat number 1. You are correct that it was the only 600 boat. It was almost the only 525 boat until me, Mentalpause, and "The Captain" decided one night that if for no other reason, an engine compartment that big needed the bulk of blower motors. 700's were not relased yet when the power had to be ordered for the boat or it too would have most likley been a 700 boat (if for no other reason the NXT drives).