I have a piece of paper at work that says that Cutler Hammer (Cut/Ham)breakers TYPE BR (These look like Bryant breakers)are good for Cutler Hammer-Challenger-Bryant-Westinghouse. These companies have all been bought out by Cut/Ham. Siemans (ITE) and Murray have always been by them self. Also Square D and GE have always been by them selfs. Then there is an after market breaker like T&B. These too are "suppose" to be good for all.
