[Hallicrafters] Mystery SX-88

[TVComlGuy at aol.com]

Hi to the group,
 
I recently acquired an SX-88 that had been in the estate of an SK from  
California.   The chassis was very dirty with dust and animal hair but  no rust or 
corrosion.  I cleaned it just using an old dry toothbrush and  most of the 
crud came off.  There are no markings for tube types, no  stampings on the back 
next to the speaker and antenna terminals, and some  markings in orange marker 
or crayon that say "#2" or just "2".  There was  no serial number plate and no 
holes where it should have been.  There was  also no hole for an SO-239 
antenna socket.  The chassis is  black not  silver in color.  There is an extra 
tube, a 6AB4 on the 2nd converter  sub-chassis that appears to have been factory 
installed as the tube socket and  rivets match those of the other tubes.  
That's about as far as I have  gotten into it but any help would be appreciated.
 
73's,
 
Ron, KB0WAR