I don't think the "C" series was avaiable in 2003 (unless later in 2003) as thats when I got my 14B-SST amp (summer time) and it is the old style faceplate, not the "C" series. By the way is the only difference is the faceplate - its purely cosmetic although it is a nicer faceplate. Can you get the seller to provide a picture - that will tell the tale...