1947-55 New Design pickup, more precisely a 1949-50 model (1949-53 grille but without the 1951+ vent windows).
The medium wheelbase (see the vertical reinforcement bar in front of the rear wheel arch) indicates either a ½-ton 100 or a ¾-ton 150 while the hood side logo seems to say 100...

I find it weird to show it as testimony to the US automotive history as its Chevrolet sibling (Advance-Design 3100, although not existing as long version like this one) is apparently a lot more known.