Good news for 1970+ Milwaukee Road fans. Some lesser roads were also announced.....
ManyBest wishes, Dave
By the lesser roads, the OP must have meant PC B&LE or NJT. CMStP&P is what tier, I wonder? We do know that All Tramps Sent Free is a first tier and B&O is a first to second tier (B&O seems to be the stuff of which 'second runs' are made).
Considering that I managed to find only three of the four numbers of the first run of IM B&O F-7s, the B&Os are certainly welcome. I was never too happy with the Bachpersonns, even when they upgraded to SPECTRUM.
It is interesting to note that the B unit on the Rich Folks and Pedigrees shows steam generator stacks. Did RF&P have those?