Okay here I am, I dont know how this one slipped by me but it is absolutely gorgeous!!! The White sewing machines were a major player in the "Sewing Machine Wars" and they built a really nice reliable machine. When you use it you will see what true quality and American pride is. The machines nowadays do not hold a candle to these old girls.
The cabinet that you have is one of my faves hands down! I missed one not long ago on CL for $5 and I am still kicking myself for it.
I do not have much information on the Whites as I do the New Home, Singer, and Japanese makers.
But I am sure someone will step up and help you with dating the machine. Try going to the Smithsonian website and go through the vast landscape of information and you might make some really interesting discoveries.
http://www.sil.si.edu/DigitalCollect...s/CF/index.cfm
Billy