Reno: Around here (NJ) there are/were a few 'custom' panels over the years, although most are long gone.
'Colton' panel/panelboards was one; 'Gavin-Graham' was/may still be another. Both of these used 'brand name' breakers within there products. Westinghouse, CH, Challenger, FPE (NOT Stablock), ITE and various others.
Myers made mobile home (trailer) panels, they were marked as being suitible for I-T-E, GE,Bryant/Westinghouse, Crouse-Hinds breakers, somewhere I have a old catalog floating around will search for it......
Thank you, Norcal. I have not removed any of the bolt in breakers as yet ... but it's good to know that the situation isn't hopeless.
For the curious, this panel is a rather primitive "all in one." That is, the same enclosure has the meter, the main breaker, the panel, and a wire gutter as well. There are separate covers over each section. Panel is NEMA-1. Even though it's a bolt-in panel, it's single phase (240). There are small plastic pieces that cover the area between the breakers.
Age? All I can say is that the circuit directory has yellowed to the point where it's hard to read the black print on it, and the slightest touch will likely cause it to fall apart. Panel is located inside an old gas station.
renosteinke, Sorry for the delayed reply but the holidays have kept me busy. As Norcal said Myers panels will accept several varities of PLUG IN breakers. What is troubleing me is that although I have seen many Myers panels in florida I have never seen a BOLT ON version. One has to question if we are talking about the same thing????