According to C. H. Wendel’s IH book, Anson, your dad’s tractors should be 1924 and should be serial nos. 700 or below. In Gary’s photo of the first Farmall, assuming they are talking production tractors, that’s the one that went to Taft, TX and should have an air stack with the flannel intake. Unless their meaning it to be a representative tractor. Wendel says they built 205 in 1924 by hand and the 1925 models should have the vortex. Doesn’t say anything about the exhaust stack? In the serial number list in the back of Wendel’s book, it says QC501-700 equals 1924, 701-1538 equals 1925. Anyway, you can see there are discrepencies in the numbers so who knows what happened. I also want to state I am just saying what is stated in C. H. Wendel’s IH book. I think you’ve got quite a prize in that photo of your dad and uncle in the IH brochure.
A couple of years ago the Robstown John Deere dealer was in the neighbors field making a video brochure of a new Bush Hog 20' flail shredder when he saw our picker working next field and he thought he wanted a JD picker in the background; so he stopped in our field where my son and I were picking. We have a John Deere 6 row picker. So anyway, my picker and parts of my farmstead are on You Tube in the background in that video. They did a poor job shredding. We had to go over it again. I think they went too fast and didn’t cut low enough. Anyway, the Bush Hog is painted red. I don’t know if that counts or not.
Anyway, type in Bush Hog BRC125 2 flail mower. You don’t have to sit through the whole video, just move your mouse down about ¾ of the way and the shredder will overtake my son driving the picker.
Gary, I don't know about the steering. I've never seen that before either. But that lower bolster part looks like the lower part of what everyone calls the duckbill steering, which is pre-wormdrive steering. Both the F20 and F30 had that duckbill type first. I'm thinking the F30 power unit is taller than an F20 so that's the way they got it up a little higher. Notice the clutch pedal, rear wheel center - lug pattern and exhaust system, maybe other, is different than a production F30.