Tex:
Yes sir, that is the FPE ones I refer to.
They rated panels as "12-24" which translated into 12 full or 24 half size (commonly called 'thins')
GE was another that used the same terminology with full & half size. Some other mfgs had really crazy 'combo' half size that had a double pole, and 2 single poles. If I remember correctly it was Murray or Bryant.
