It is 7" set (7JP4) An Emerson 639... Very compact and cute!
http://www.tvhistory.tv/1949-Emerson-639-7in.JPG
Add: The set is about 10"H x 14"W x 16" D (For comparison, a vt-71 Motorola is nearly 17" W, but an inch shorter and approx the same depth)
Good luck,
jr