You might be interested in the exact wording in an IHC brochure for the H and M that I have had since the early 40s:
Under "Special Equipment," p. 6:
"The heat indicator and radiator shutter, which come as regular equipment with tractors having distillate-and-gasoline engine, can also be supplied as special equipment for use with the high-compression gasoline engine."
In this booklet, a picture of a very early H shows the crank coming through the Lift-All bracket. Next to the crank, on the left, right next to the steering-wheel support, is the "magneto shorting switch button."
There is a code on the back of this booklet that probably indicates the publication date, but there is no way to decode this that I can see. My guess is that the booklet was put out around 1940. Some of the tractors in this booklet have no lights, no starter, no Lift-All. All these were special equipment. Tells you a bit about farming in those days. Small farmers were close to self-sufficient in some ways (gardens and canning, their own milk, butter, meat, eggs), but they didn't always make much cash. They might have thought hard about a little extra money for a starter ("I'll just crank 'er--been doin' it for 20 years") or lights ("Who's gonna be out'n the field at night?"). Power lift? "A set of two-row cultivators aren't all that hard to lift, one side at a time, so why pay money for that there power lift, huh?" The H, in color on page 2, is shown without any of this equipment, and there is a small picture of one with steel wheels. The M on age 3 is on rubber, but again, it is without starter, lights or Lift-All. Hard to imagine today even having the choice of opting out of rubber, lights, starter and a power lift! (I do remember that some of the tires made in the late 30s didn't have much in the way of cleats, and some farmers thought rubber "slipped too much"). It is impossible from these pictures to tell where the shutter crank might have been supported when there was no Lift-All bracket. It may have come through the fuel-tank support, and I imagine the magneto switch would have been there, too.
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