Serial  Number 03344  Cant find a noticeable flaw anywhere on face, one tiny 2mm x2mm paint rub on left side center. This one is branded Advanced Schools, Inc. , I have never seen one branded this way so I think it's fairly rare. I have plugged it in and used my Fluke Frequency counter to verify that it indeed is functional. Very well preserved. I can print a manual for you if you like, the link to the assembly manual is listed here in the description. $80.00 + shipping. Heath Manual in PDF file below, click to view.