I made some measurements as requested.
Track, from outside of one brake drum to the other, is 53.5 in., to the center line of the wheels makes it 56.5 total, plus or minus.
The wheel is 24 in. diameter, and 2.75 in. width.
Brakes; The diameter of the moving drum that gets squeezed is 12 3/8 in., and the width of the 'brake pad' band is 1 1/4 in.
The 6 lug nuts on the remaining wheel are 1/2 small hex, and the other 3 are large hex. 2 of the large ones are 'domed', and show the original green paint.
Let me know what other info you might need.