>>1773423Boston & Maine T1; the overhang is a Coffin feedwater heater. Didn't last long on the B&M as they considered them lemons due to the trailing truck having issues and they didn't want to deal with them. 18 sold off during WW2; 10 to the SP & 8 to the ATSF. IIRC, both the ATSF & SP rebuilt them. As well, they were the only Berks they ever had. Remaining 7 scrapped between 1947 & 1951.