So my set wasn't Bonney. But it was. Just not regular Bonney...
Not sure what you mean, but I think that style
was their regular offering in the timeframe we have narrowed in on. A stark departure, no doubt, from their original line, which remained fairly consistent (minor changes) from inception through 1957, apparently.
Im assuming Dayton has always been a brand of WW Grainger ?
It's very confusing. Either the Grainger website contradicts itself, or I am not understanding. A company history article says "Dayton" was trademarked in 1937. Later, in the same dang article, it says that in 1966 Grainger acquired the shares of Dayton Electric Manufacturing Company that it didn't already own, implying it was a separate enterprise that it had been buying out a little at a time for years. So which is it? Was Dayton a Grainger TM? Or a separate company they bought? Or were there two different Daytons?! (None of this has anything to do with the Dayton Electric car company in Dayton, Ohio, right?) There are plenty of machines out there with an address of 'Dayton Electrical Manufacturing Co., 748 West Adams Street, Chicago 6, IL', which is Postal Code, pre-Zip Code, pre-1963.