The Boston and Albany was a railroad connecting Boston, MA, and Albany, NY. Number 39's a coal-burner called "Mamora" and was nicknamed "Eddy Clock" after the designer, Wilson Eddy. It received its nickname because it was said to run with clock-like precision. It has 63" drive wheels, link-and-pin couplers, a "domeless" boiler and weighs 67,150 pounds. Number 39 is the sole survivor of 100 similar engines built for the Boston and Albany.