Big Tom is as knowledgeable as they come regarding Favilla but I personally don't think he has a total handle on what the company was doing in the 20's and 30's. There should be more printed matter for this company around than there seems to be. I surprised at the lack considering the volume they had to be producing at one time. This was a decent sized manufacturer, not on the same order size-wise as Gibson, Martin, Harmony, or Kay but they seem to have put out a lot of instruments.
Tevion Fta 2005 Firmware Update here. Tom says they were manufacturing this instrument from the 20's but that they never manufactured them for anyone else. Does it look familiar? This coupled with a personal recollection on Mugwumps of a factory in NYC makes me suspect that Favilla built for at least one other other marketing company that just happened to be based in New York. Jim is right, I am a big fan of Favilla mandolins, I guess as much due to the family story and my correspondence with Big Tom who is a real gentleman and a fundamentally decent human being. But I have a general interest in east coast Italo-American builders in general. I have had a number of Favillas--flatbacks and bowls--over the years and my primary bowl these days is a very lightweight and resonant Favilla.