Looking for Silvertone Truphonic information

[edisonclassm]

I removed the motor board to take a look at the horn to see what kind of a design it might have and found it's nothing special. Just a straight horn made of wood as you can see. The motor is a two spring Heineman motor of quality that runs smooth as silk. There was a paper label om the motor board under the turntable showing the factory from which the phonograph came. The notation is abbreviated BP Co. I wonder if that stood for Brunswick Phonograph Co.? Any other suggestions?

[OrthoFan]

I remember seeing that very same horn for sale on eBay awhile back. While it looks like it doesn't have much of a taper, the inside of the horn was tapered very much like a Victor Consolette horn, though shunted slightly sideways. Whether this horn followed an exponential type curve is anyone's guess.