Well, having gotten my question answered on Belpaire fireboxes, not to my
satisfaction, as few other roads ran them, even used from the Pa., I am gonna
risk asking what roads, several in the Northeast, obviously, ran Northeastern
cabooses, originally and used, and did other than the Pa. (and its relatives, like the Long Island RR,) run N5C's? I'd guess more cabooses wound up used and traveled than the locos. ("Santa Fe All The Way" on the side of either of
the above makes me cringe)