Reference Material Links:

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www.tractordata.com/farm-tractors/000/2/9/290-farmall-h.html

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www.farmall-h.com

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Chronicling America « Library of Congress

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https://patents.google.com/advanced

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https://www.google.com/search?q=mccormick+farmall+c&rlz=1CAACAG_enUS788US788&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjisOr-rezZAhUMNd8KHZzxAKcQ_AUICigB&biw=1366&bih=629&safe=active&ssui=on#imgrc=4SPPgpVZAna4jM: