You will find this series of Hallicrafters made chassis used in several sets including the Delco TV-71, Hallicrafters T-54, 505, 506 and 514 and I've seen a 1948 Firestone that looked a lot like this set, but I've never had a chance to examine one.
The made a lot of production changes during that time, so your parts list might not be 100% correct.
In the below linked thread, we discovered that a Hallicrafters and a Delco came down the same production line one day apart and by the 88's in both rubber stamps that had been inserted upside down, probably indicated the same inspector checked both.
http://www.videokarma.org/showthread.php?t=256167
When I mentioned "late production" back then, I was referring to late as meaning after Hallicrafters eliminated channel one on the sets, not which IF strip was used.
Jas.