I don't know if this rig ended up in Boston, but it was a Mack Demo at the Boston Branch Mack dealer.
Boston Branch Demo 1941 Mack E type 45 S 1034
Mack factory photo used with permition from the Mack museum.
Boston Branch Demo 1941 Mack E type 45 S 1034
Mack factory photo used with permition from the Mack museum.