Bryant & Westinghouse are both Cutler Hammer now. Murray belongs to Siemens.
The "BR" stood for Bryant, which was Westinghouse's residential/ light commercial loadcenter line, later rebranded as Westinghouse until Eaton bought the Westinghouse line & merged them into their Cutler-Hammer brand......
OT,can you think of how many brands have disappeared over the years? Let me start.
ITE Circuit Breaker Company, ITE Imperial Corp.,Gould/ITE, ITE Electrical Products, Bulldog Electric. ITE was rebranded as Seimens.
Zinsco,Sylvania,Challenger, T&B, T&B bought Challenger & the Westinghouse safety swich line from Eaton & renamed them them T&B they left the market & who knows why, they later sold the rights to Zinsco to Connecticut Electric.
Crouse-Hinds (formerly Murray & now Murray again) EDIT: Murray/Arrow-Hart was what it was branded before it became Crouse-Hinds.
Federal, Federal Pacific Electric.
And of course Bryant & Westinghouse. (Eaton Cutler-Hammer).