David Weaver
Jack plane is one of the places where the quality of the iron wouldn't be as big of a deal. On the context of the late 70s, I could see their claims as long as they limited comparisons to contemporary Stanley. O actually like the continental style, but better in a vintage all beech plane with a tapered double iron.

I gather that what they use for steel in ece planes is inexpensive coil hardenable (induction?) Chrome vanadium that has a very forgiving transition temperature requirement.