disc options pre D series

Started this instead of hijacking another thread.

It seems like whenever someone posts about a snap coupler disc to knock down plowed ground, people immediately say you need a heavier disc. Well then, what were the options? What discs were available when the B, C and W series were new? I'll admit I don't know a lot about the B or C series, but, weren't they meant to be the do everything tractor for the small farmer that could probably only afford one tractor? What was available from Allis Chalmers as a "heavy disc" for them?

Weren't they marketed as a set? You bought a tractor, a plow, a disc and either a drill or planter? Most of what I've seen, it was a mounted disc.

If the snap coupler mounted disc wasn't meant to knock down plowed ground, what was it meant for?

You have to remember that B's started a tractor revolution.  It was meant and marketed to farmers being weaned from the horse.  Horses didn't do well with a heavy disc harrow, and the whole small farming culture was plow, drag harrow, cultivate several directions, harvest...  Now if you had a bigger tractor, you might buy a #30 or 40 lift type disc, for say a W series tractor, all of this was sort of in its infancy, late depression and through WW2.  It took getting through the depression, and war, before the manufacturing and economy, was ready for mounted equipment to be  introduced and produced...