Nell, all you had to do is ask the old guy (me), so here goes, B&M "Highliners" in a nutshell.
From the date of their purchase until early in 1955, they all were left in bare metal with no emblems.
From 1955 to 1956, minuteman emblems were applied to bare metal under the engineer's and fireman's windows on both ends.
A year after Pat McGinnis took over the presidency of the B&M (1957), the fronts and backs of all Budds were painted white with a black center door and two BM emblems on both ends. The emblems consisted of a blue "B" and a white "M" trimmed with black.
The B&M declared bankruptcy in 1970, from that point on, there were no more re-paints, just the standard BM emblem as above, applied to bare metal.
Sometime around 1972 the standard BM emblem was changed to a blue "B" with white trim and a white "M" trimmed in black.
"T" emblems were applied to al B&M Budds on the sides in the middle of the window band in late 1973 early 1974.
A whole hodgepodge of "T" purple schemes started showing up in 1976, ranging from the conservative (purple letterboard), to the attractive (purple window band trimmed with yellow stripes). Some cars were so quickly given the "T" treatment, that the B&M emblems were peeled off the ends without removing the adhesive residue, which quickly attracted road grime in the shape of the B&M emblem, this was soon dubbed the "dirt scheme".
Another, often overlooked fact about B&M Budds was that the undercarriage, from the time they were built, right up until the mid 1970's were painted "Navy Blue", with the exception of the stainless steel engine covers and battery box covers. But, then again, B&M Budds were usually so dirty, you couldn't see the blue paint.
David Hutchinson