Caboose B&M 104391 was one of 500 similar units that once served on the Boston & Maine Railroad. It was built by the B&M at their shops in East Fitchburg, Mass. in 1907. Many of these cabooses were later rebuilt with steel underframes, steel trucks, and a full-width cupola. This caboose is the only existing B&M caboose with the narrow cupola and combination steel and wood 8' wheelbase trucks. It was sold to the Belfast and Moosehead Lake R.R. in Maine in 1954 and was retired by that road in 1968. The car is 42' long and weighs 23 tons.
