Two Sites I found show Sanabria as existing only in 1960.
Here's one,
http://www.tvhistory.tv/1960-2000-TVManufacturers.htm
The Other is Steve Mc'Voys Site that I assume you are all familiar with.
http://www.earlytelevision.org/index.html
I would think that set
could be from 1960, the knobs look older (they look like Emersons actually) but if this was a small company with limited resources they might not have the most up to date styling.
What does the chassis look like?