Didn't Bonney and Herbrand get absorbed in to the Triangle Corporation?
I was thinking Bon-e-con probably had to be a Bonney economy line, and if they merged with herbrand then my assumption could be correct.
From what little I've seen so far, that 1/4" Bon-e-con (and an identical Bonney ratchet) appeared in catalogs with 3/8" and 1/2" versions of the ratchet design below (top one), @/after Triangle acquired Herbrand to go along with Bonney. I've yet to see a 1/4" version of this ratchet design, IMHO the poorest Bonney (and several other Triangle brands) ever designed. The ultimate (and last) Bonney/Triangle design followed not long after, the big and reliable double pawl round head (bottom one).
A lot of fantastic sets here! I've got a few I haven't seen posted yet, will have to try and find what box they got stuffed into, then find the ratchet in the ratchet boxes...