Another tidbit of circumstantial evidence to chew over. Below is a link to an article written by William N Parker who worked for Western Television Company. The article is a fantastic history of his recollections in the mechanical television field. On the third page he says the following:
"I arrived in Chicago about the middle of May with my first assignment; that of modifying Crosley three-dial, metal box, trf receivers for operation at 2100 kc. The 171 output tube passed sufficient current to operate a plate-type neon lamp."
So it seems Western was using Crosley tuners at some point early on before they released their own version. Perhaps my set predates the Visionette entirely?
http://www.antiquewireless.org/uploa...television.pdf