Robert Von Dohlen:
I'll add my 2 cents about your tractor...
Notice the dash...it's all metal (Original, 70, 100, 71, 102, 122, 72, and 73 had an all steel pedistal/dash) The 104 has a fiberglass dash covering the steel pedistal.
Note the shifter..it's short, and only has one bend (the 70, 100, 71, 72, and 73 had that kind of shifter) The 102, 122, 104, and 124 used a taller shifter that has 2 bends in it to clear the center section of the fenders...which the 104 should also have.
Note the height of the 'tunnel' on the frame. The short tunnel frames were used on the 70, 100, 71, 72, and 73's.
Also, the steering wheel...note the acorn nut. That steering wheel is on the Original, 70, 100, 71, 72, and 73....the 104, 124 had a plastic center cap in the wheel with IH on it.
I'm pretty sure you have a 72..with a 10hp in it.