[TMC] Manual for SBSA-11 Wanted

[WA5CAB at cs.com]

A ham and TMC collector in Argentina wrote me and asked whether I had or 
could find a manual on the following piece of equipment that he has:

SIDEBAND SELECTOR
 Model SBSA-11
 Serial NO 33118
 
The "SBS" is printed on the nameplate.  "A-11" is stamped in a blank area 
to the right of SBS.

I've never heard of it and a Google search only turns up minimal 
information about SBS-1.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480