I gotta tell you, I had the same question.
After a bit of poking around I couldn't find a direct answer, so I sent an email to Rick at Condor. The 3/16" is the official measurement for the thickness of the spine at the hilt (though my ruler says it's actually more like 5/32"

), and the new catalog listing of 3/16" is a correction for the prior 5/64" listing.
There is also a consistent taper for the entire 14" of the blade that takes the width down to about 1/16". For this it is very well balanced.
Anywho, it is a full flat grind, though slight, right to a polished and convexed secondary bevel. The handle is adequate, being polypropylene or some such, and for the price you really couldn't find much better.
For a point of reference: don't get me wrong, I love my CS barongs, but I'm loving my Condor more. For about the same cost you get, for it's application (IMHO), a better steel (1075 over CS's 1055), a proven heat treatment, convexed edge, thick blade (though tapered and well-balanced), and perfect customer service, while losing a bit on ergonomics and having no sheath.
Yeah, I know that was a bit more that just verifying the thickness of the blade...but, well, I gush when it's about something I truly appreciate!
Take care, all!