What a cool guitar
Here's some Bacon & Day info from the Jedistar site.
"David Day and Paul Bacon. Sold to Gretsch in 1940.
Although the Bacon company built many of the finest (and most expensive) banjos of the 1920's they had no experience, or apparent interest, in building guitars. They had dabbled with ukuleles and mandolins in the early 1920's and had even sold a few Martin guitars with a Bacon stamp, but in the main had been able to prosper with a banjo-only line. When the high-end banjo market collapsed in the early 1930's Fred Bacon and David Day, both older men with decades of experience in the music business, took the expedient route and contracted with outside makers to supply them with guitars that could be finished off as "B&D's". While similar to other Regal-built instruments including the Tonk Bros. Washburn line these "B&D" guitars are always distinctively appointed, and also the best that could be had. "
I found another B & D NePlus Ultra Troubador model, but it's a bit different looking then yours.
The Senorita Troubador model is also similar to the above NePlus Ultra.