Airline (Hallicrafters 506) TV

Just picked up one of these and can seem to find a reference
to it. It's made by Hallicrafters but branded M-W's "Airline"; the front panel's painted metal at the bottom with fabric behind a metal 'lattice' above. Were the 506's made both w/ and w/o
channel 1?

[Eric H]

According to Harry Posters guide the T-506 is from 1949 and has a 12 channel tuner (2-13)
The 505 is a 1948 and has the 13 channel tuner (1-13).
I have one of each and this seems to hold true.


Eric