Barcalo specialty wrench

I figured this was another Ford model T- related tool, but Google Lens tells me it was actually made for the Delco Light Co. of Dayton, Ohio, a manufacturer of gas-powered generator systems used to provide electricity to rural farms and homes during the first half of the last century.

 There is a iron cross-type (or keystone?) logo next to the "nut" text (bottom image) that doesn't seem to relate to either company.

And, below, a better view (from an ebay ad) (Thanks Dave)

Ebay