I recently scored what I believe to be a '83 Cannondale. Serial number is AA00*40. First of all, am I correct in thinking that it is an '83? Second, the '83 catalog elsewhere on the vintage C'dale site does not show components for the ST-300, but does for the ST-500. Mine appears to have the components of a '500, but is there anyway to tell from the serial number? Lastly, anyone know how to figure -- assuming that it is an '83 -- how many '83's were made? PS I bought a new SR-300 in '83 and a new Black Lightning in '86. Still have the '86.