Its getting a little off topic, but I respectfully disagree with the characterization of BR style panels as Zinsco heritage. Although there is some overlap in ownership, the panel and breaker designs were unrelated. Its complicated, but here’s a basic timeline:
1950-1972 Zinsco designs, sells, and evolves its plug-in panel and breaker line.
1973 Zinsco sells company to GTE Sylvania who continues selling product
1978 Panel line rebranded as “Challenger”, design remains the same
1982 GTE divests Zinsco to a new company created with Challenger Electric. The new company immediately stops making all Zinsco panels and redesigns all new panels and breakers with compatibility to Bryant and Crouse Hinds interiors. Replacement Zinsco breakers are continued to be made separaely for aftermarket purpose.
1988 Westinghouse acquires Challenger Electric, Bryant and Challenger brands merged and redesigned as BR, production moved from Bridgeport. CT to Jackson, MS.
1994 Westinghouse acquired by Eaton/Cutler Hammer, Zinsco breaker business unit sold to T&B. Eaton separated BR and CH plug in panel lines and moved both to production to Lincoln, IL.
So the only thing Zinsco and BR panels ever shared was the Challenger name briefly, but there was never a common design between them. I know that won’t change your mind if you already dislike BR panels, everyone has their own opinions, I just wanted to point out that they are not the same as Zinsco.
I tend to look at all the 1" wide breakers as about the same quality (Siemens, BR, SquareD Homeline, GE) and all the 3/4" wide breakers as a bit more premium (CH, SquareD QO.)